technical report itak rt 369/2020 pep · 2021. 1. 11. · rt-369-2020 - instituto de tecnologia...

TECHNICAL REPORT ITAK

RT 369/2020 PEP

PROFICIENCY TEST IN

PHOSPHATE ANALYZES

10th ROUND – DECEMBER 2020

RT-369-2020 - Instituto de Tecnologia August Kekulé - Contacts: email: [email protected];

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PROFICIENCY TEST REPORT FOR PHOSPHATE ANALYSIS – 10th ROUND

1) Introduction

This Technical Report presents the obtained results, its evaluation and interpretation for

the participant laboratory.

The description of the statistical criteria and techniques used in the evaluation and

general information about this proficiency testing is in a separate module and available

to each participant in ITAK PTP Management System.

ITAK does not issue preliminary report. This current report is characterized as Final

Technical Report.

2) Preliminary Information

Tab. 1: Round information and participant laboratory identification

Round Identification: 10th Round – PT in Phosphate Analysis

Period of execution: November and December 2020

Laboratory Identification: ALS Arabia

Unit/Site: Jeddah – Saudit Arabia

Laboratory Code: 08

Test Item Codes for this round: P19 and P20

Issue Data of this Report: December 30th, 2020

3) Participants of the Proficiency Testing

Tab. 2: Participating laboratories of this proficiency testing

Participating Laboratory Name Unit/Site

ALS Arabia Jeddah –Saudit Arabia

CMOC Brasil – Fosfatos Ouvidor Ouvidor/GO – Brazil

ITAK – Instituto de Tecnologia August Kekulé Ltda João Monlevade/MG – Brazil

Mineração Morro Verde Ltda Pratápolis/MG – Brazil

Mosaic Fertilizantes P&K Ltda – Araxá Araxá/MG – Brazil

Mosaic Fertilizantes P&K Ltda – Catalão Catalão/GO – Brazil

Mosaic Fertilizantes P&K Ltda – Tapira Tapira/MG – Brazil

Yara Brasil Fertilizantes S.A. Serra do Salitre/MG – Brazil

4) Appeal

It is afforded to the participant of Proficiency Testing Programs - ITAK the right of appeal

as to the evaluation of its performance given in this Technical Report. For that, the

participating laboratory who have doubts or does not agree with the performance

evaluation should register an appeal on the ITAK PTP Management System. According to

a requirement of ISO/IEC 17043 – Conformity assessment - General requirements for

Proficiency Testing, ITAK maintains a documented procedure governing all the systematic

including deadlines for appeal, analyses, and responses to participating clients.


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5) Performance Commentary

Tab. 3: Performance evaluation of the participating laboratory – consolidated information

Test

Item Analyzed

Parameter

Assigned

Value

obtained by

Standard

Deviation

obtained by

Reference

Tables

Z Score

Performance

Youden

Performance

P19 Al2O3 Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2

5 Satisfactory Satisfactory

P20 Al2O3 6 Satisfactory

P19 BaO Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2

8 Satisfactory Insufficient

results P20 BaO 9 Satisfactory

P19 CaO Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


P20 CaO 15 Satisfactory

P19 Fe2O3 Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


P20 Fe2O3 18 Satisfactory

P19 K2O Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


results P20 K2O 21 Satisfactory

P19 LOI Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


results P20 LOI 24 Satisfactory

P19 MgO Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


P20 MgO 27 Satisfactory

P19 MnO Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


results P20 MnO 30 Satisfactory

P19 Nb2O5 Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2

32 Lab has not

participated

Lab has not

participated P20 Nb2O5 33

P19 P2O5 Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


P20 P2O5 36 Satisfactory

P19 S Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


results P20 S 39 Not evaluated

P19 SiO2 Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


P20 SiO2 42 Satisfactory

P19 SrO Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2


results P20 SrO 45 Satisfactory

P19 TiO2 Mean of data set

means; Outliers

according

ISO 5725-2

Reproducibility

Standard Deviation

ISO 5725-2

47 Satisfactory Satisfactory P20 TiO2 48 Satisfactory

Note: The parameter C was not evaluated due to the insufficient number of valid results.


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6) Summary of Assigned Values, Standard Deviations and Uncertainties

Tab. 3: Assigned Values, Standard Deviations for proficiency assessment and Standard

Uncertainties – Summarized Information.

Parameter Test Item Unit Assigned Value

(XD)

Standard

Deviation (S)

Standard

Uncertainty (U)

Al2O3 P19 % 0.828 0.045 0.030

P20 % 0.780 0.030 0.027

BaO P19 % 1.150 0.076 0.055

P20 % 0.1544 0.0184 0.0133

CaO P19 % 44.98 0.73 0.33

P20 % 47.46 0.38 0.22

Fe2O3 P19 % 3.281 0.19 0.084

P20 % 3.165 0.20 0.090

K2O P19 % 0.0841 0.0053 0.0041

P20 % 0.182 0.020 0.015

LOI P19 % 2.27 0.27 0.22

P20 % 2.76 0.19 0.15

MgO P19 % 0.914 0.024 0.016

P20 % 0.6318 0.0180 0.0152

MnO P19 % 0.1561 0.0320 0.0253

P20 % 0.1101 0.0242 0.0137

Nb2O5 P19 % 0.1228 0.0075 0.0066

P20 % 0.08447 0.01349 0.01192

P2O5 P19 % 34.085 0.088 0.086

P20 % 34.102 0.245 0.158

S P19 % 0.164 0.024 0.024

P20 % --- --- ---

SiO2 P19 % 5.006 0.067 0.059

P20 % 4.248 0.092 0.070

SrO P19 % 0.875 0.122 0.108

P20 % 0.853 0.027 0.024

TiO2 P19 % 1.229 0.10 0.050

P20 % 2.262 0.14 0.069

Note: The parameter C was not evaluated due to the insufficient number of valid results.


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7) Mandel’s Graphs

Pic. 1: Graph with Mandel’s h statistics for sample P19 for all involved parameters.

Pic. 2: Graph with Mandel’s h statistics for sample P20 for all involved parameters.


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Pic. 3: Graph with Mandel’s k statistics for sample P19 for all involved parameters.

Pic. 4: Graph with Mandel’s k statistics for sample P20 for all involved parameters.


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8) Results, Methods, Graphs and Interpretation.

Tab. 4 – Assigned Value, Standard Deviations and Standard Uncertainties for Al2O3.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)

Standard Uncertainty

𝒖 (%) Sample

P19 0.828 0.045 0.030

P20 0.780 0.030 0.027

Tab. 5 – Reported results, means and Z Scores of participating laboratories in the PT for Al2O3

analysis in the sample P19.

Results for Al2O3 – Sample P19

Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 Al2O3 0.810 0.815 0.810 0.813 0.816 % 0.813 -0.345 FUS-XRF

Lab 02 Al2O3 --- --- --- --- --- % --- --- ---

Lab 03 Al2O3 0.760 0.770 0.780 0.790 0.780 % 0.776 -1.161 FUS-XRF

Lab 04 Al2O3 0.790 0.800 0.800 0.770 0.780 % 0.788 -0.895 FUS-XRF

Lab 05 Al2O3 0.650 0.660 0.660 0.650 0.660 % 0.656 -3.820 FUS-XRF

Lab 06 Al2O3 0.847 0.846 0.833 0.828 0.844 % 0.840 0.249 FUS-XRF

Lab 07 Al2O3 0.890 0.910 0.900 0.910 0.910 % 0.904 1.676 FUS-XRF

Lab 08 Al2O3 0.820 0.810 0.830 0.810 0.820 % 0.818 -0.230 FUS-XRF

Lab 09 Al2O3 0.870 0.851 0.880 0.830 0.870 % 0.860 0.705 FUS-XRF

Tab. 6 – Reported results, means and Z Scores of participating laboratories in the PT for Al2O3


Results for Al2O3 – Sample P20 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 Al2O3 0.758 0.760 0.759 0.754 0.757 % 0.758 -0.741 FUS-XRF

Lab 02 Al2O3 --- --- --- --- --- % --- --- ---

Lab 03 Al2O3 0.780 0.750 0.760 0.770 0.760 % 0.764 -0.531 FUS-XRF

Lab 04 Al2O3 0.760 0.750 0.780 0.760 0.760 % 0.762 -0.596 FUS-XRF

Lab 05 Al2O3 0.460 0.640 0.560 0.500 0.530 % 0.538 -7.965 FUS-XRF

Lab 06 Al2O3 0.784 0.788 0.833 0.785 0.780 % 0.794 0.456 FUS-XRF

Lab 07 Al2O3 0.880 0.890 0.880 0.860 0.880 % 0.878 3.219 FUS-XRF

Lab 08 Al2O3 0.780 0.770 0.770 0.770 0.790 % 0.776 -0.136 FUS-XRF

Lab 09 Al2O3 0.840 0.822 0.867 0.818 0.789 % 0.827 1.548 FUS-XRF

Legend:

FUS-XRF Fusion / X-Ray Fluorescence

X,XX Satisfactory Result

X,XX Questionable Result

X,XX Unsatisfactory Result


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Pic. 5: Graph with Z Scores for samples P19 and P20 for Al2O3 Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for Al2O3 analysis in the

samples P19 and P20, according to the criterion for Z Score evaluating.

Pic. 6: Youden Plot for Al2O3 Analysis.

Performance Commentary – Confidence Ellipse:

The Confidence Ellipse obtained for Al2O3 analysis showed normal dispersion among the

participating laboratories. The laboratories 03, 05, 07 and 09 were excluded from the Confidence

Ellipse.

Laboratory 08 - ALS Arabia showed a SATISFACTORY performance for Al2O3 analysis according

to the criterion for Youden evaluation.


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Pic. 7: Ranking Graph according to the Mandel’s k statistic to sample P19 for Al2O3 Analysis.

Pic. 8: Ranking Graph according to the Mandel’s k statistic to sample P20 for Al2O3 Analysis.


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Tab. 7 – Assigned Value, Standard Deviations and Standard Uncertainties for BaO.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 1.150 0.076 0.055

P20 0.1544 0.0184 0.0133

Tab. 8 – Reported results, means and Z Scores of participating laboratories in the PT for BaO


Results for BaO – Sample P19


Lab 01 BaO 1.048 1.046 1.045 1.051 1.049 % 1.048 -1.346 FUS-XRF

Lab 02 BaO --- --- --- --- --- % --- --- ---

Lab 03 BaO 1.160 1.130 1.090 1.160 1.130 % 1.134 -0.212 FUS-XRF

Lab 04 BaO 1.220 1.210 1.220 1.240 1.180 % 1.214 0.839 FUS-XRF

Lab 05 BaO 1.240 1.230 1.220 1.230 1.240 % 1.232 1.076 FUS-XRF

Lab 06 BaO --- --- --- --- --- % --- --- ---

Lab 07 BaO --- --- --- --- --- % --- --- ---

Lab 08 BaO 1.123 1.123 1.122 1.124 1.123 % 1.123 -0.357 FUS-XRF

Lab 09 BaO 1.914 1.880 1.892 1.887 1.834 % 1.881 9.615 FUS-XRF

Tab. 9 – Reported results, means and Z Scores of participating laboratories in the PT for BaO


Results for BaO – Sample P20


Lab 01 BaO 0.150 0.151 0.151 0.154 0.151 % 0.151 -0.165 FUS-XRF

Lab 02 BaO --- --- --- --- --- % --- --- ---

Lab 03 BaO 0.140 0.150 0.140 0.150 0.140 % 0.144 -0.568 FUS-XRF

Lab 04 BaO 0.140 0.160 0.130 0.130 0.130 % 0.138 -0.895 FUS-XRF

Lab 05 BaO 0.200 0.170 0.160 0.190 0.180 % 0.180 1.391 FUS-XRF

Lab 06 BaO --- --- --- --- --- % --- --- --- Lab 07 BaO --- --- --- --- --- % --- --- --- Lab 08 BaO 0.158 0.159 0.160 0.159 0.158 % 0.159 0.237 FUS-XRF

Lab 09 BaO 0.949 0.954 0.922 0.979 0.935 % 0.948 43.174 FUS-XRF

Legend:






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Pic. 9: Graph with Z Scores for samples P19 and P20 for BaO Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for BaO analysis in the


Confidence Ellipse:

The valid results are not sufficient to build the Confidence Ellipse for the parameter BaO.


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Pic. 10: Ranking Graph according to the Mandel’s k statistic to sample P19 for BaO Analysis.

Pic. 11: Ranking Graph according to the Mandel’s k statistic to sample P20 for BaO Analysis.


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Tab. 10 – Assigned Value, Standard Deviations and Standard Uncertainties for C.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 --- --- ---

P20 --- --- ---

Tab. 11 – Reported results, means and Z Scores of participating laboratories in the PT for C


Results for C – Sample P19 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 C --- --- --- --- --- % --- --- ---

Lab 02 C --- --- --- --- --- % --- --- ---

Lab 03 C 0.290 0.280 0.270 0.270 0.270 % 0.276 --- IR

Lab 04 C --- --- --- --- --- % --- --- ---

Lab 05 C --- --- --- --- --- % --- --- ---

Lab 06 C --- --- --- --- --- % --- --- ---

Lab 07 C --- --- --- --- --- % --- --- ---

Lab 08 C 0.360 0.360 0.350 0.350 0.350 % 0.354 --- IR

Lab 09 C --- --- --- --- --- % --- --- ---

Tab. 12 – Reported results, means and Z Scores of participating laboratories in the PT for C


Results for C – Sample P20


Lab 01 C --- --- --- --- --- % --- --- ---

Lab 02 C --- --- --- --- --- % --- --- ---

Lab 03 C 0.550 0.540 0.550 0.540 0.540 % 0.544 --- IR

Lab 04 C --- --- --- --- --- % --- --- --- Lab 05 C --- --- --- --- --- % --- --- --- Lab 06 C --- --- --- --- --- % --- --- --- Lab 07 C --- --- --- --- --- % --- --- --- Lab 08 C 0.620 0.620 0.630 0.620 0.620 % 0.622 --- IR

Lab 09 C --- --- --- --- --- % --- --- ---

Legend:

IR Infrared Analyzer





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Assigned Value, EP Standard Deviation and Standard Uncertainty Calculations:

The valid results are not sufficient to calculate these parameters for C.

Mandel’s Graphics:

The valid results are not sufficient to build the Mandel’s Graphics for the parameter C.

Z Scores:

The valid results are not sufficient to calculate the Z Scores for the parameter C.

Confidence Ellipse:

The valid results are not sufficient to build the Confidence Ellipse for the parameter C.

Ranking Graphics:

The valid results are not sufficient to build the Ranking Graphics for the parameter C.


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Tab. 13 – Assigned Value, Standard Deviations and Standard Uncertainties for CaO.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 44.98 0.73 0.33

P20 47.46 0.38 0.22

Tab. 14 – Reported results, means and Z Scores of participating laboratories in the PT for CaO


Results for CaO – Sample P19 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 CaO 44.158 44.160 44.151 44.180 44.165 % 44.163 -1.128 FUS-XRF

Lab 02 CaO --- --- --- --- --- % --- --- ---

Lab 03 CaO 46.000 45.960 46.160 45.980 45.850 % 45.990 1.388 FUS-XRF

Lab 04 CaO 45.970 45.790 45.820 45.580 45.870 % 45.806 1.135 FUS-XRF

Lab 05 CaO 45.300 45.280 45.380 45.400 45.310 % 45.334 0.485 FUS-XRF

Lab 06 CaO 44.237 44.281 44.264 44.384 44.469 % 44.327 -0.902 FUS-XRF

Lab 07 CaO 45.050 45.050 45.070 45.080 45.070 % 45.064 0.113 FUS-XRF

Lab 08 CaO 45.100 45.000 45.000 45.000 45.100 % 45.040 0.080 FUS-XRF

Lab 09 CaO 44.039 44.138 44.072 44.119 44.295 % 44.133 -1.170 FUS-XRF

Tab. 15 – Reported results, means and Z Scores of participating laboratories in the PT for CaO


Results for CaO – Sample P20


Lab 01 CaO 47.459 47.763 47.752 47.770 47.755 % 47.700 0.644 FUS-XRF

Lab 02 CaO --- --- --- --- --- % --- --- ---

Lab 03 CaO 47.380 47.560 47.620 47.490 47.770 % 47.564 0.284 FUS-XRF

Lab 04 CaO 47.820 47.870 47.520 47.660 47.670 % 47.708 0.666 FUS-XRF

Lab 05 CaO 47.880 46.790 47.440 47.720 47.550 % 47.476 0.051 FUS-XRF

Lab 06 CaO 46.774 46.775 46.839 46.775 46.716 % 46.776 -1.802 FUS-XRF

Lab 07 CaO 47.310 47.300 47.310 47.320 47.320 % 47.312 -0.383 FUS-XRF

Lab 08 CaO 47.800 47.700 47.600 47.700 47.600 % 47.680 0.591 FUS-XRF

Lab 09 CaO 46.460 46.666 46.538 46.560 46.541 % 46.553 -2.392 FUS-XRF

Legend:






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Pic. 12: Graph with Z Scores for samples P19 and P20 for CaO Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for CaO analysis in the


Pic. 13: Youden Plot for CaO Analysis.


The Confidence Ellipse obtained for CaO analysis showed normal dispersion among the

participating laboratories. None laboratory was excluded from the Confidence Ellipse.

Laboratory 08 - ALS Arabia showed a SATISFACTORY performance for CaO analysis according to

the criterion for Youden evaluation.


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Pic. 14: Ranking Graph according to the Mandel’s k statistic to sample P19 for CaO Analysis.

Pic. 15: Ranking Graph according to the Mandel’s k statistic to sample P20 for CaO Analysis.


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Tab. 16 – Assigned Value, Standard Deviations and Standard Uncertainties for Fe2O3.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 3.281 0.19 0.084

P20 3.165 0.20 0.090

Tab. 17 – Reported results, means and Z Scores of participating laboratories in the PT for Fe2O3


Results for Fe2O3 – Sample P19


Lab 01 Fe2O3 3.332 3.326 3.336 3.340 3.331 % 3.333 0.275 FUS-XRF

Lab 02 Fe2O3 --- --- --- --- --- % --- --- ---

Lab 03 Fe2O3 3.300 3.290 3.310 3.290 3.280 % 3.294 0.069 FUS-XRF

Lab 04 Fe2O3 3.420 3.410 3.400 3.390 3.380 % 3.400 0.630 FUS-XRF

Lab 05 Fe2O3 3.240 3.270 3.240 3.300 3.350 % 3.280 -0.006 FUS-XRF

Lab 06 Fe2O3 3.038 3.048 3.043 3.040 3.053 % 3.044 -1.254 FUS-XRF

Lab 07 Fe2O3 3.440 3.440 3.450 3.450 3.420 % 3.440 0.842 FUS-XRF

Lab 08 Fe2O3 3.450 3.480 3.450 3.460 3.470 % 3.462 0.958 FUS-XRF

Lab 09 Fe2O3 2.992 2.993 2.997 2.990 2.998 % 2.994 -1.520 FUS-XRF

Tab. 18 – Reported results, means and Z Scores of participating laboratories in the PT for Fe2O3


Results for Fe2O3 – Sample P20


Lab 01 Fe2O3 3.198 3.186 3.191 3.185 3.190 % 3.190 0.125 FUS-XRF

Lab 02 Fe2O3 --- --- --- --- --- % --- --- ---

Lab 03 Fe2O3 3.210 3.160 3.230 3.220 3.220 % 3.208 0.215 FUS-XRF

Lab 04 Fe2O3 3.280 3.300 3.280 3.260 3.290 % 3.282 0.582 FUS-XRF

Lab 05 Fe2O3 2.970 2.990 3.080 2.950 3.070 % 3.012 -0.757 FUS-XRF

Lab 06 Fe2O3 2.939 2.951 2.946 2.940 2.924 % 2.940 -1.115 FUS-XRF

Lab 07 Fe2O3 3.290 3.300 3.280 3.290 3.300 % 3.292 0.631 FUS-XRF

Lab 08 Fe2O3 3.400 3.380 3.390 3.390 3.380 % 3.388 1.107 FUS-XRF

Lab 09 Fe2O3 2.896 2.896 2.903 2.903 2.884 % 2.896 -1.331 FUS-XRF

Legend:






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Pic. 16: Graph with Z Scores for samples P19 and P20 for Fe2O3 Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for Fe2O3 analysis in the


Pic. 17: Youden Plot for Fe2O3 Analysis.


The Confidence Ellipse obtained for Fe2O3 analysis showed normal dispersion among the


Laboratory 08 - ALS Arabia showed a SATISFACTORY performance for Fe2O3 analysis according



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Pic. 18: Ranking Graph according to the Mandel’s k statistic to sample P19 for Fe2O3 Analysis.

Pic. 19: Ranking Graph according to the Mandel’s k statistic to sample P20 for Fe2O3 Analysis.


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Tab. 19 – Assigned Value, Standard Deviations and Standard Uncertainties for K2O.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 0.0841 0.0053 0.0041

P20 0.182 0.020 0.015

Tab. 20 – Reported results, means and Z Scores of participating laboratories in the PT for K2O


Results for K2O – Sample P19 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 K2O --- --- --- --- --- % --- --- ---

Lab 02 K2O --- --- --- --- --- % --- --- ---

Lab 03 K2O --- --- --- --- --- % --- --- ---

Lab 04 K2O --- --- --- --- --- % --- --- ---

Lab 05 K2O --- --- --- --- --- % --- --- ---

Lab 06 K2O 0.080 0.079 0.083 0.083 0.082 % 0.081 -0.556 FUS-XRF

Lab 07 K2O 0.060 0.050 0.050 0.060 0.060 % 0.056 -5.258 FUS-XRF

Lab 08 K2O 0.090 0.090 0.090 0.090 0.090 % 0.090 1.111 FUS-XRF

Lab 09 K2O 0.079 0.081 0.084 0.079 0.081 % 0.081 -0.612 FUS-XRF

Tab. 21 – Reported results, means and Z Scores of participating laboratories in the PT for K2O


Results for K2O – Sample P20


Lab 01 K2O --- --- --- --- --- % --- --- ---

Lab 02 K2O --- --- --- --- --- % --- --- ---

Lab 03 K2O --- --- --- --- --- % --- --- ---

Lab 04 K2O --- --- --- --- --- % --- --- --- Lab 05 K2O --- --- --- --- --- % --- --- --- Lab 06 K2O 0.183 0.187 0.186 0.187 0.180 % 0.184 0.104 FUS-XRF

Lab 07 K2O 0.150 0.150 0.160 0.160 0.150 % 0.154 -1.405 FUS-XRF

Lab 08 K2O 0.200 0.200 0.200 0.200 0.200 % 0.200 0.879 FUS-XRF

Lab 09 K2O 0.187 0.190 0.194 0.189 0.193 % 0.191 0.412 FUS-XRF

Legend:






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Pic. 20: Graph with Z Scores for samples P19 and P20 for K2O Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for K2O analysis in the


Confidence Ellipse:

The valid results are not sufficient to build the Confidence Ellipse for the parameter K2O.


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Pic. 21: Ranking Graph according to the Mandel’s k statistic to sample P19 for K2O Analysis.

Pic. 22: Ranking Graph according to the Mandel’s k statistic to sample P20 for K2O Analysis.


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Tab. 22 – Assigned Value, Standard Deviations and Standard Uncertainties for LOI (Loss On

Ignition).

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 2.27 0.27 0.22

P20 2.76 0.19 0.15

Tab. 23 – Reported results, means and Z Scores of participating laboratories in the PT for LOI


Results for PF – Sample P19


Lab 01 LOI --- --- --- --- --- % --- --- ---

Lab 02 LOI --- --- --- --- --- % --- --- ---

Lab 03 LOI 2.260 2.220 2.270 2.170 2.290 % 2.242 -0.093 GRAV

Lab 04 LOI 2.190 2.160 2.250 2.230 2.270 % 2.220 -0.174 GRAV

Lab 05 LOI 1.840 1.910 1.820 1.880 1.880 % 1.866 -1.474 GRAV

Lab 06 LOI 2.369 2.499 2.519 2.380 2.359 % 2.425 0.580 GRAV

Lab 07 LOI --- --- --- --- --- % --- --- --- Lab 08 LOI 2.580 2.580 2.590 2.600 2.570 % 2.584 1.163 GRAV

Lab 09 LOI --- --- --- --- --- % --- --- ---

Tab. 24 – Reported results, means and Z Scores of participating laboratories in the PT for LOI


Results for PF – Sample P20 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 LOI --- --- --- --- --- % --- --- ---

Lab 02 LOI --- --- --- --- --- % --- --- ---

Lab 03 LOI 2.720 2.620 2.740 2.680 2.600 % 2.672 -0.463 GRAV

Lab 04 LOI 2.680 2.720 2.640 2.670 2.650 % 2.672 -0.463 GRAV

Lab 05 LOI 2.600 2.550 2.480 2.540 2.540 % 2.542 -1.133 GRAV

Lab 06 LOI 2.969 2.989 2.979 2.969 3.039 % 2.989 1.170 GRAV

Lab 07 LOI --- --- --- --- --- % --- --- ---

Lab 08 LOI 2.920 2.930 2.950 2.930 2.940 % 2.934 0.888 GRAV

Lab 09 LOI --- --- --- --- --- % --- --- ---

Legend:

GRAV Gravimetric Method





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Pic. 23: Graph with Z Scores for samples P19 and P20 for LOI Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for LOI analysis in the



The valid results are not sufficient to build the Confidence Ellipse for the parameter LOI.


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Pic. 24: Ranking Graph according to the Mandel’s k statistic to sample P19 for LOI Analysis.

Pic. 25: Ranking Graph according to the Mandel’s k statistic to sample P20 for LOI Analysis.


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Tab. 25 – Assigned Value, Standard Deviations and Standard Uncertainties for MgO.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 0.914 0.024 0.016

P20 0.6318 0.0180 0.0152

Tab. 26 – Reported results, means and Z Scores of participating laboratories in the PT for MgO


Results for MgO – Sample P19


Lab 01 MgO 0.807 0.812 0.805 0.813 0.812 % 0.810 -4.390 FUS-XRF

Lab 02 MgO --- --- --- --- --- % --- --- ---

Lab 03 MgO 0.880 0.890 0.900 0.930 0.900 % 0.900 -0.586 FUS-XRF

Lab 04 MgO 0.890 0.910 0.890 0.910 0.900 % 0.900 -0.586 FUS-XRF

Lab 05 MgO 0.900 0.900 0.880 0.900 0.900 % 0.896 -0.754 FUS-XRF

Lab 06 MgO 0.929 0.923 0.926 0.926 0.940 % 0.928 0.612 FUS-XRF

Lab 07 MgO 0.890 0.880 0.890 0.900 0.900 % 0.892 -0.923 FUS-XRF

Lab 08 MgO 0.940 0.950 0.950 0.940 0.940 % 0.944 1.270 FUS-XRF

Lab 09 MgO 0.929 0.922 0.940 0.939 0.952 % 0.936 0.950 FUS-XRF

Tab. 27 – Reported results, means and Z Scores of participating laboratories in the PT for MgO


Results for MgO – Sample P20


Lab 01 MgO 0.547 0.542 0.541 0.540 0.540 % 0.542 -4.987 FUS-XRF

Lab 02 MgO --- --- --- --- --- % --- --- ---

Lab 03 MgO 0.630 0.610 0.640 0.620 0.620 % 0.624 -0.431 FUS-XRF

Lab 04 MgO 0.610 0.620 0.600 0.600 0.640 % 0.614 -0.987 FUS-XRF

Lab 05 MgO 0.600 0.880 0.600 0.650 0.610 % 0.668 2.013 FUS-XRF

Lab 06 MgO 0.650 0.646 0.646 0.645 0.640 % 0.645 0.746 FUS-XRF

Lab 07 MgO 0.620 0.620 0.630 0.610 0.610 % 0.618 -0.765 FUS-XRF

Lab 08 MgO 0.650 0.650 0.650 0.650 0.650 % 0.650 1.013 FUS-XRF

Lab 09 MgO 0.652 0.634 0.657 0.620 0.633 % 0.639 0.413 FUS-XRF

Legend:






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Pic. 26: Graph with Z Scores for samples P19 and P20 for MgO Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for MgO analysis in the


Pic. 27: Youden Plot for MgO Analysis.


The Confidence Ellipse obtained for MgO analysis showed normal dispersion among the

participating laboratories. The laboratories 01 and 05 were excluded from the Confidence

Ellipse.

Laboratory 08 - ALS Arabia showed a SATISFACTORY performance for MgO analysis according



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Pic. 28: Ranking Graph according to the Mandel’s k statistic to sample P19 for MgO Analysis.

Pic. 29: Ranking Graph according to the Mandel’s k statistic to sample P20 for MgO Analysis.


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Tab. 28 – Assigned Value, Standard Deviations and Standard Uncertainties for MnO.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 0.1561 0.0320 0.0253

P20 0.1101 0.0242 0.0137

Tab. 29 – Reported results, means and Z Scores of participating laboratories in the PT for MnO


Results for MnO – Sample P19


Lab 01 MnO --- --- --- --- --- % --- --- ---

Lab 02 MnO --- --- --- --- --- % --- --- ---

Lab 03 MnO 0.160 0.160 0.160 0.160 0.160 % 0.160 0.122 FUS-XRF

Lab 04 MnO --- --- --- --- --- % --- --- ---

Lab 05 MnO <0.10 <0.10 <0.10 <0.10 <0.10 % <0.10 --- FUS-XRF

Lab 06 MnO 0.132 0.132 0.129 0.131 0.134 % 0.132 -0.768 FUS-XRF

Lab 07 MnO 0.150 0.160 0.150 0.150 0.150 % 0.152 -0.127 FUS-XRF

Lab 08 MnO 0.200 0.210 0.210 0.210 0.210 % 0.208 1.621 FUS-XRF

Lab 09 MnO 0.131 0.127 0.128 0.127 0.131 % 0.129 -0.852 FUS-XRF

Tab. 30 – Reported results, means and Z Scores of participating laboratories in the PT for MnO


Results for MnO – Sample P20


Lab 01 MnO --- --- --- --- --- % --- --- ---

Lab 02 MnO --- --- --- --- --- % --- --- ---

Lab 03 MnO 0.110 0.110 0.120 0.120 0.110 % 0.114 0.160 FUS-XRF

Lab 04 MnO --- --- --- --- --- % --- --- --- Lab 05 MnO <0.10 <0.10 <0.10 <0.10 <0.10 % <0.10 --- FUS-XRF

Lab 06 MnO 0.094 0.093 0.092 0.094 0.090 % 0.093 -0.724 FUS-XRF

Lab 07 MnO 0.100 0.110 0.100 0.100 0.100 % 0.102 -0.336 FUS-XRF

Lab 08 MnO 0.150 0.150 0.150 0.150 0.150 % 0.150 1.649 FUS-XRF

Lab 09 MnO 0.093 0.092 0.092 0.092 0.091 % 0.092 -0.749 FUS-XRF

Legend:






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Pic. 30: Graph with Z Scores for samples P19 and P20 for MnO Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for MnO analysis in the


Confidence Ellipse:

The valid results are not sufficient to build the Confidence Ellipse for the parameter MnO.


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Pic. 31: Ranking Graph according to the Mandel’s k statistic to sample P19 for MnO Analysis.

Pic. 32: Ranking Graph according to the Mandel’s k statistic to sample P20 for MnO Analysis.


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Tab. 31 – Assigned Value, Standard Deviations and Standard Uncertainties for Nb2O5.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 0.1228 0.0075 0.0066

P20 0.08447 0.01349 0.01192

Tab. 32 – Reported results, means and Z Scores of participating laboratories in the PT for Nb2O5


Results for Nb2O5 – Sample P19


Lab 01 Nb2O5 0.115 0.115 0.113 0.113 0.112 % 0.114 -1.223 FUS-XRF

Lab 02 Nb2O5 --- --- --- --- --- % --- --- ---

Lab 03 Nb2O5 <0.10 <0.10 <0.10 <0.10 <0.10 % <0.10 --- FUS-XRF

Lab 04 Nb2O5 <0.10 <0.10 <0.10 <0.10 <0.10 % <0.10 --- FUS-XRF

Lab 05 Nb2O5 0.120 0.120 0.120 0.120 0.130 % 0.122 -0.105 FUS-XRF

Lab 06 Nb2O5 0.128 0.126 0.128 0.128 0.127 % 0.127 0.561 FUS-XRF

Lab 07 Nb2O5 --- --- --- --- --- % --- --- ---

Lab 08 Nb2O5 --- --- --- --- --- % --- --- ---

Lab 09 Nb2O5 0.131 0.129 0.130 0.129 0.129 % 0.130 0.907 FUS-XRF

Tab. 33 – Reported results, means and Z Scores of participating laboratories in the PT for Nb2O5


Results for Nb2O5 – Sample P20


Lab 01 Nb2O5 0.055 0.056 0.061 0.064 0.058 % 0.059 -1.903 FUS-XRF

Lab 02 Nb2O5 --- --- --- --- --- % --- --- ---

Lab 03 Nb2O5 <0.10 <0.10 <0.10 <0.10 <0.10 % <0.10 --- FUS-XRF

Lab 04 Nb2O5 <0.10 <0.10 <0.10 <0.10 <0.10 % <0.10 --- FUS-XRF

Lab 05 Nb2O5 0.100 0.100 0.100 0.100 0.100 % 0.100 1.152 FUS-XRF

Lab 06 Nb2O5 0.076 0.076 0.076 0.076 0.075 % 0.075 -0.672 FUS-XRF

Lab 07 Nb2O5 --- --- --- --- --- % --- --- --- Lab 08 Nb2O5 --- --- --- --- --- % --- --- --- Lab 09 Nb2O5 0.078 0.077 0.078 0.078 0.077 % 0.078 -0.509 FUS-XRF

Legend:






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Pic. 33: Graph with Z Scores for samples P19 and P20 for Nb2O5 Analysis.

Laboratory 08 - ALS Arabia has not participated of the PTP for the parameter Nb2O5.

Confidence Ellipse:

The valid results are not sufficient to build the Confidence Ellipse for the parameter Nb2O5.


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Pic. 34: Ranking Graph according to the Mandel’s k statistic to sample P19 for Nb2O5 Analysis.

Pic. 35: Ranking Graph according to the Mandel’s k statistic to sample P20 for Nb2O5 Analysis.


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Tab. 34 – Assigned Value, Standard Deviations and Standard Uncertainties for P2O5.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 34.085 0.088 0.086

P20 34.102 0.245 0.158

Tab. 35 – Reported results, means and Z Scores of participating laboratories in the PT for P2O5


Results for P2O5 – Sample P19


Lab 01 P2O5 33.870 33.848 33.823 33.852 33.820 % 33.843 -2.758 FUS-XRF

Lab 02 P2O5 33.890 34.076 33.958 33.841 34.386 % 34.030 -0.619 DIGAC-GRAV

Lab 03 P2O5 34.140 34.190 33.990 34.050 34.200 % 34.114 0.336 FUS-XRF

Lab 04 P2O5 34.100 34.050 34.000 34.010 34.150 % 34.062 -0.257 FUS-XRF

Lab 05 P2O5 34.110 33.950 34.080 34.150 33.950 % 34.048 -0.416 FUS-XRF

Lab 06 P2O5 34.058 34.099 34.089 34.201 34.261 % 34.141 0.647 FUS-XRF

Lab 07 P2O5 34.480 34.470 34.470 34.490 34.490 % 34.480 4.510 FUS-XRF

Lab 08 P2O5 34.100 34.200 34.000 34.000 34.000 % 34.060 -0.279 FUS-XRF

Lab 09 P2O5 34.014 34.047 34.018 34.074 34.254 % 34.081 -0.035 FUS-XRF

Tab. 36 – Reported results, means and Z Scores of participating laboratories in the PT for P2O5


Results for P2O5 – Sample P20


Lab 01 P2O5 33.648 33.639 33.641 33.645 33.632 % 33.641 -1.878 FUS-XRF

Lab 02 P2O5 34.600 33.999 34.477 33.942 34.225 % 34.249 0.600 DIGAC-GRAV

Lab 03 P2O5 34.010 34.150 34.100 34.040 33.920 % 34.044 -0.235 FUS-XRF

Lab 04 P2O5 33.960 34.090 33.850 34.020 34.050 % 33.994 -0.439 FUS-XRF

Lab 05 P2O5 34.060 34.080 34.000 33.880 33.970 % 33.998 -0.422 FUS-XRF

Lab 06 P2O5 34.266 34.307 34.217 34.253 34.262 % 34.261 0.649 FUS-XRF

Lab 07 P2O5 34.410 34.420 34.410 34.400 34.420 % 34.412 1.266 FUS-XRF

Lab 08 P2O5 34.400 34.300 34.200 34.200 34.300 % 34.280 0.728 FUS-XRF

Lab 09 P2O5 34.184 34.238 34.179 34.192 34.118 % 34.182 0.329 FUS-XRF

Legend:


DIGAC-GRAV Acid dissolution / Gravimetric method





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Pic. 36: Graph with Z Scores for samples P19 and P20 for P2O5 Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for P2O5 analysis in the


Pic. 37: Youden Plot for P2O5 Analysis.


The Confidence Ellipse obtained for P2O5 analysis showed normal dispersion among the


Ellipse.

Laboratory 08 - ALS Arabia showed a SATISFACTORY performance for P2O5 analysis according to



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Pic. 38: Ranking Graph according to the Mandel’s k statistic to sample P19 for P2O5 Analysis.

Pic. 39: Ranking Graph according to the Mandel’s k statistic to sample P20 for P2O5 Analysis.


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Tab. 37 – Assigned Value, Standard Deviations and Standard Uncertainties for S.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 0.164 0.024 0.024

P20 --- --- ---

Tab. 38 – Reported results, means and Z Scores of participating laboratories in the PT for S


Results for S – Sample P19 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 S --- --- --- --- --- % --- --- ---

Lab 02 S --- --- --- --- --- % --- --- ---

Lab 03 S 0.180 0.180 0.170 0.170 0.160 % 0.172 0.338 IR

Lab 04 S --- --- --- --- --- % --- --- ---

Lab 05 S 0.140 0.130 0.140 0.140 0.140 % 0.138 -1.097 IR

Lab 06 S --- --- --- --- --- % --- --- ---

Lab 07 S --- --- --- --- --- % --- --- ---

Lab 08 S 0.190 0.180 0.180 0.180 0.180 % 0.182 0.760 IR

Lab 09 S --- --- --- --- --- % --- --- ---

Tab. 39 – Reported results, means and Z Scores of participating laboratories in the PT for S


Results for S – Sample P20 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 S --- --- --- --- --- % --- --- ---

Lab 02 S --- --- --- --- --- % --- --- ---

Lab 03 S <0.10 <0.10 <0.10 <0.10 <0.10 % <0.10 --- IR

Lab 04 S --- --- --- --- --- % --- --- ---

Lab 05 S <0.10 <0.10 <0.10 <0.10 <0.10 % <0.10 --- IR

Lab 06 S --- --- --- --- --- % --- --- ---

Lab 07 S --- --- --- --- --- % --- --- ---

Lab 08 S 0.040 0.040 0.040 0.040 0.040 % 0.040 --- IR

Lab 09 S --- --- --- --- --- % --- --- ---

Legend:

IR Combustion / InfraRed Analyser





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Pic. 40: Graph with Z Scores for sample P19 for S Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for S analysis in the sample

P19, according to the criterion for Z Score evaluating.

Assigned Value, EP Standard Deviation and Standard Uncertainty Calculations:

The valid results are not sufficient to calculate these parameters for S for the sample P20.

Z Scores:

The valid results are not sufficient to calculate the Z Scores for the parameter S for the sample

P20.

Confidence Ellipse:

The valid results are not sufficient to build the Confidence Ellipse for the parameter S.

Ranking Graphics:

The valid results are not sufficient to build the Ranking Graphics for the parameter S for the

sample P20.


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Pic. 41: Ranking Graph according to the Mandel’s k statistic to the sample P19 for S Analysis.


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Tab. 40 – Assigned Value, Standard Deviations and Standard Uncertainties for SiO2.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 5.006 0.067 0.059

P20 4.248 0.092 0.070

Tab. 41 – Reported results, means and Z Scores of participating laboratories in the PT for SiO2


Results for SiO2 – Sample P19 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 SiO2 4.968 4.976 4.978 4.981 4.980 % 4.977 -0.439 FUS-XRF

Lab 02 SiO2 --- --- --- --- --- % --- --- ---

Lab 03 SiO2 4.940 4.910 4.990 4.910 4.910 % 4.932 -1.107 FUS-XRF

Lab 04 SiO2 4.890 5.020 4.990 4.910 4.950 % 4.952 -0.807 FUS-XRF

Lab 05 SiO2 4.620 4.610 4.590 4.580 4.790 % 4.638 -5.510 FUS-XRF

Lab 06 SiO2 5.096 4.995 5.013 5.038 5.080 % 5.044 0.572 FUS-XRF

Lab 07 SiO2 5.090 5.100 5.110 5.110 5.120 % 5.106 1.499 FUS-XRF

Lab 08 SiO2 5.010 5.020 5.020 5.010 5.020 % 5.016 0.151 FUS-XRF

Lab 09 SiO2 5.077 4.953 5.004 4.991 5.047 % 5.014 0.127 FUS-XRF

Tab. 42 – Reported results, means and Z Scores of participating laboratories in the PT for SiO2


Results for SiO2 – Sample P20 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 SiO2 4.126 4.116 4.107 4.118 4.120 % 4.117 -1.425 FUS-XRF

Lab 02 SiO2 --- --- --- --- --- % --- --- ---

Lab 03 SiO2 4.160 4.120 4.200 4.190 4.170 % 4.168 -0.873 FUS-XRF

Lab 04 SiO2 4.300 4.330 4.330 4.350 4.320 % 4.326 0.853 FUS-XRF

Lab 05 SiO2 3.750 3.910 4.060 3.800 3.920 % 3.888 -3.930 FUS-XRF

Lab 06 SiO2 4.247 4.271 4.332 4.239 4.214 % 4.260 0.136 FUS-XRF

Lab 07 SiO2 4.380 4.380 4.370 4.370 4.370 % 4.374 1.377 FUS-XRF

Lab 08 SiO2 4.220 4.220 4.210 4.230 4.240 % 4.224 -0.261 FUS-XRF

Lab 09 SiO2 4.300 4.303 4.286 4.244 4.194 % 4.265 0.191 FUS-XRF

Legend:






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Pic. 42: Graph with Z Scores for samples P19 and P20 for SiO2 Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for SiO2 analysis in the


Pic. 43: Youden Plot for SiO2 Analysis.


The Confidence Ellipse obtained for SiO2 analysis showed normal dispersion among the


Ellipse.

Laboratory 08 - ALS Arabia showed a SATISFACTORY performance for SiO2 analysis according to



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Pic. 44: Ranking Graph according to the Mandel’s k statistic to sample P19 for SiO2 Analysis.

Pic. 45: Ranking Graph according to the Mandel’s k statistic to sample P20 for SiO2 Analysis.


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Tab. 43 – Assigned Value, Standard Deviations and Standard Uncertainties for SrO.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 0.875 0.122 0.108

P20 0.853 0.027 0.024

Tab. 44 – Reported results, means and Z Scores of participating laboratories in the PT for SrO


Results for SrO – Sample P19


Lab 01 SrO --- --- --- --- --- % --- --- ---

Lab 02 SrO --- --- --- --- --- % --- --- ---

Lab 03 SrO 0.800 0.800 0.810 0.800 0.800 % 0.802 -0.594 FUS-XRF

Lab 04 SrO 0.820 0.810 0.810 0.800 0.800 % 0.808 -0.545 FUS-XRF

Lab 05 SrO 1.080 1.050 1.040 1.060 1.050 % 1.056 1.488 FUS-XRF

Lab 06 SrO --- --- --- --- --- % --- --- --- Lab 07 SrO --- --- --- --- --- % --- --- --- Lab 08 SrO 0.830 0.840 0.830 0.830 0.830 % 0.832 -0.348 FUS-XRF

Lab 09 SrO --- --- --- --- --- % --- --- ---

Tab. 45 – Reported results, means and Z Scores of participating laboratories in the PT for SrO


Results for SrO – Sample P20


Lab 01 SrO --- --- --- --- --- % --- --- ---

Lab 02 SrO --- --- --- --- --- % --- --- ---

Lab 03 SrO 0.850 0.850 0.850 0.850 0.850 % 0.850 -0.100 FUS-XRF

Lab 04 SrO 0.820 0.830 0.830 0.830 0.830 % 0.828 -0.924 FUS-XRF

Lab 05 SrO 1.190 0.930 1.070 1.170 1.170 % 1.106 9.485 FUS-XRF

Lab 06 SrO --- --- --- --- --- % --- --- ---

Lab 07 SrO --- --- --- --- --- % --- --- ---

Lab 08 SrO 0.870 0.890 0.870 0.890 0.880 % 0.880 1.023 FUS-XRF

Lab 09 SrO --- --- --- --- --- % --- --- ---

Legend:






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Pic. 46: Graph with Z Scores for the samples P19 and P20 for SrO Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for SrO analysis in the


Confidence Ellipse:

The valid results are not sufficient to build the Confidence Ellipse for the parameter SrO.


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Pic. 47: Ranking Graph according to the Mandel’s k statistic to the sample P19 for SrO Analysis.

Pic. 48: Ranking Graph according to the Mandel’s k statistic to the sample P20 for SrO Analysis.


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Tab. 46 – Assigned Value, Standard Deviations and Standard Uncertainties for TiO2.

Assigned Value

𝑿𝑫 (%)

Standard Deviation

𝒔 (%)


𝒖 (%) Sample

P19 1.229 0.10 0.050

P20 2.262 0.14 0.069

Tab. 47 – Reported results, means and Z Scores of participating laboratories in the PT for TiO2


Results for TiO2 – Sample P19 Code Parameter 1 2 3 4 5 Unit Average Z Score Method

Lab 01 TiO2 --- --- --- --- --- % --- --- ---

Lab 02 TiO2 --- --- --- --- --- % --- --- ---

Lab 03 TiO2 1.240 1.230 1.260 1.250 1.210 % 1.238 0.091 FUS-XRF

Lab 04 TiO2 1.210 1.270 1.280 1.240 1.250 % 1.250 0.206 FUS-XRF

Lab 05 TiO2 1.170 1.200 1.160 1.190 1.220 % 1.188 -0.389 FUS-XRF

Lab 06 TiO2 1.134 1.124 1.125 1.127 1.129 % 1.128 -0.969 FUS-XRF

Lab 07 TiO2 1.340 1.330 1.340 1.350 1.350 % 1.342 1.089 FUS-XRF

Lab 08 TiO2 1.370 1.370 1.360 1.360 1.370 % 1.366 1.319 FUS-XRF

Lab 09 TiO2 1.089 1.093 1.088 1.080 1.089 % 1.088 -1.350 FUS-XRF

Tab. 48 – Reported results, means and Z Scores of participating laboratories in the PT for TiO2


Results for TiO2 – Sample P20


Lab 01 TiO2 --- --- --- --- --- % --- --- ---

Lab 02 TiO2 --- --- --- --- --- % --- --- ---

Lab 03 TiO2 2.260 2.260 2.240 2.280 2.270 % 2.262 0.002 FUS-XRF

Lab 04 TiO2 2.230 2.290 2.280 2.260 2.250 % 2.262 0.002 FUS-XRF

Lab 05 TiO2 2.060 2.220 2.090 2.060 2.120 % 2.110 -1.062 FUS-XRF

Lab 06 TiO2 2.132 2.145 2.139 2.145 2.126 % 2.137 -0.871 FUS-XRF

Lab 07 TiO2 2.360 2.360 2.340 2.340 2.350 % 2.350 0.618 FUS-XRF

Lab 08 TiO2 2.480 2.470 2.480 2.470 2.480 % 2.476 1.500 FUS-XRF

Lab 09 TiO2 2.072 2.099 2.091 2.090 2.062 % 2.083 -1.253 FUS-XRF

Legend:






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Pic. 49: Graph with Z Scores for samples P19 and P20 for TiO2 Analysis.

Laboratory 08 - ALS Arabia presented SATISFACTORY performance for TiO2 analysis in the


Pic. 50: Youden Plot for TiO2 Analysis.


The Confidence Ellipse obtained for TiO2 analysis showed normal dispersion among the


Laboratory 08 - ALS Arabia showed a SATISFACTORY performance for TiO2 analysis according to



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Pic. 51: Ranking Graph according to the Mandel’s k statistic to the sample P19 for TiO2 Analysis.

Pic. 52: Ranking Graph according to the Mandel’s k statistic to the sample P20 for TiO2 Analysis.

technical report itak rt 369/2020 pep · 2021. 1. 11. · rt-369-2020 - instituto de tecnologia...

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