april 8, 2013 - craft · april 8, 2013. 4. where is dissolved co. 2. measured? co. 2. is measured...
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Why is dissolved CO2 measured?
The CO2 contentstrongly influences the fresh taste of beveragesis a considerable cost factorQuality ControlProduction Control
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Where is dissolved CO2 measured?
CO2 is measured in…
Beer, mixed beer, cider
Soft drinks
Mineral water
Wine and sparkling wine
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CO2 absorption/solubilityCO2 absorption/solubility ξ is influenced by
– temperature– sugar– alcohol– acids & flavors– dissolved air – etc.
CO2 absorption/solubility in beverages is up to 20% lower than it is in pure water!CarboQC contains pre-defined as well as customer-specific methods to meet all requirements!
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Basics of CO2 measurement
Measurement units
Gram per liter [g/L] Grams of CO2 per liter of liquid
Volumes [vol.] Volumes of CO2 at 0 °C and 1.01326 bar
(std. atmosphere) dissolved per liquid volume
1 vol. = 1.976 g/L Conversion
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Anton Paar’s CO2 measuring principle
How does the
Multiple Volume
Expansion
Method work?
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Anton Paar’s CO2 measuring principle
What makes the Multiple Volume Expansion method that outstanding?
Anton Paar’s CO2 meter selectively determines the concentration of
dissolved CO2 in beverages not influenced by other residual gases
such as air or nitrogen.
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1.00
1.02
1.04
1.06
1.08
1.10
0 10 20 30 40 50
% Volume expansion
CO2 V
olume
s1. measurement
Deviation ?
Correction !
2. measurement
3. Multiple Volume Expansion Method
CO2 +dissolved airCO2 (without air)
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Anton Paar’s CO2 measuring principle
MVE method – selective measurement
Additional output of Anton Paar’s CO2 meter:
Air Index (sum of dissolved N2 + O2)
N2 Index (dissolved N2) if beverage is filled under N2
Package pressure
Results just fororientation
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Why is dissolved O2 measured?
The O2 contentstrongly reduces the shelf life of beverages
andcan cause corrosion of cans
O2 measurement ensuresproduct safety consistent beverage quality
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Where is dissolved O2 measured?
O2 is measured in…
Beer, mixed beer, cider
Wine and sparkling wine
Juices
Some soft drinksgrowing demand due to trend towards
natural flavorings, addition of vitamins
and avoiding of preservatives
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Basics of O2 measurement
Optochemical O2 measurement
The new series of oxygen meter with CboxQC and OxyQC
use an optochemical sensor for fast and highly accurate
determination of dissolved oxygen.
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O2 measuring principle
Dye molecule absorbs lightTransfer of electrons to higher energy levelReturn to the original energy level, emission of light (luminescence)
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O2 measuring principle
Dye molecule absorbs light Transfer to a higher energy levelCollision with oxygen: deactivation of the dye moleculeReturn to the original energy level, no emission of light
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Basics of O2 measurement
Measurement units
[mg/L] Milligrams of O2 per liter of liquid
[ppm] Parts per million
[ppb] Parts per billion
[% sat.] Percent saturation
1 mg/L ≈ 1 ppm = 1000 ppb Conversion
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Product presentation
Most precise measurement performanceCO2 repeatability 0.005 vol.CO2 reproducibility 0.025 vol.
Compatible with Anton Paar’smeasuring systemsPFD Filling Device is required4mm hose connections
Fully protected for harsh environmentsBall valve for at-line measurementGood measurement performanceNot compatible with measuring systemsFilter set for measurement with PFD available 6 mm hose connections
Laboratory use
At-line use
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Product presentation
At-line version especially protected for harsh environments
Robust rubber protection covers the housingRubber handle for good grip in the handWithstands internal drop test Robust new carrying strapDatalogger
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PFD Filling Device
What is a PFD Filling Device for?
Enables filling of sample intomeasuring instrumentswithout loss of CO2 and O2
Applicable for cans, PET bottles, glass bottles
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PFD Filling Device
PET bottles: hanging(PET bottles expand withoverpressure)
Cans: upside down, standing
Glass bottles: upright, standing
Positioning of different packages
PET bottle adapter
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Tips for installation
Sample flow in lab version Sample flow in at-line version
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Product portfolio
CboxQC and CboxQC At-line are combined CO2 and O2 meters to determine the true amount of dissolved CO2 and O2 in beverages for use
− in the lab in combination with thePFD filling device
− and at-line.
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Alex 500 accurately measuressamples during all production stepsfrom your beer wort to the packagedproduct
Quickly react in case of any undesireddeviations during the brewing process
Certainty from wort to bottle
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Have your beer‘s alcohol and extractcontent, calories, degree of fermentationand many more parameters determinedwhenever you wish
No need to send samples to an externallab
Independence from external labs
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Ensure consistent quality and taste of your brews
Ensure what‘s on the label is in the bottle
Count on keeping your customer promise
Always keep your label promise
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The NIR measuring cell is temperature controlled to 20 °C
Technology part one: NIR absorption
Detectormeasures
absorbanceNIR light sourceemmits light atthree different wavelengths Sample
cell
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Alex 500 measures density at room temperature and shows the result corrected for thereference temperature of 20 °C
Technology part two: oscillating U-tube principle
U-tube filled with air U-tube filled with sample
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Alex 500 provides two different operation modes:
– The fermentation monitor mode:For extract measurement in wort & fermentation control
– The standard measuring mode:For determination of alcohol, real/original extract, degreeof fermentation, calories, etc. in (almost) finished beer
Certainty from wort to bottle
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Alex 500 directly displays the fermentation curve for up to 40 different brews, identified via sample IDs
Up to 100 results per sample ID are storedand shown in the respective graph
You can immediately take action in caseof any undesired deviations
Fermentation monitor mode
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Alex 500 shows alcohol, density and up totwo measuring units of your choice
Accuracy alcohol: 0.2 % v/vAccuracy density: 0.001 g/cm3
Up to 1000 results are stored in the internalmemory, ready for transfer to a PC or printer
Standard mode
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Available measuring units
Standard mode
Alcohol Density SG
Calories Degrees lost Original / real / apparent extract
Original / present gravity Spirit indication Real / apparent degree offermentation
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Accuracy of some important parameters
Some important specifications
Measuring unit AccuracyAlcohol 0.2 % v/v
Density 0.001 g/cm3
Real / apparent extract typ. ~ 0.4 % w/w
Original extract typ. ~ 0.8 °Plato
Real degree of fermentation typ. ~ 5 %
Calories typ. ~ 3 kcal/100mL
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MEASURING PROCEDUREFrom taking the sample to the final measuring result.
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Clear, already filtered beerDegas: by filling sample into a flask, shake sample and snift
or by e.g. putting the sample into an ultrasonic bathFilter: filter sample through a 5 μm paper filter
– Turbid, unfiltered beers and/or very dark beersDegasAdd 1g/100 mL (approx. 1 teaspoon per 100 mL) Kieselguhr(diatomaceous earth) & mix it with the sampleFilter
Sample preparation
1
2
1
2
3
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Pressing the key startsthe peristaltic pump forautomatic filling of the preparedsample
After filling, the measurementstarts automatically
Filling sample & starting the measurement
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What else?
Fermentation monitor mode Standard mode
Cleaning• With deionized water after each measurement series• No cleaning needed in between measurements! • Use suitable lab cleaner in case of protein residues
Check/Calibration Regularly; with deionized water Every day, with deionized
water
Adjustment If check fails: easy & quick adjustment with deionized water