agilent data sheet 5989-6317en

Agilent 7890A Network GasChromatographData Sheet

ChromatographicPerformance* Retention time repeatability

< 0.008% or < 0.0008 min

Area repeatability < 1%RSD

The Agilent 7890A is a state-of-the-artgas chromatograph that provides supe-rior performance for all applications.Key to its performance is the use ofadvanced electronic pneumatic control(EPC) modules and high performanceGC oven temperature control. Each EPCunit is optimized for its intended usewith a specific inlet and detectoroption.

GC oven temperature control of the7890A oven allows for fast and precisetemperature ramping. Overall thermalperformance provides optimal chro-matography including peak symmetry,retention time repeatability, and reten-tion index accuracy.

The combination of precise pneumaticand temperature control leads to

extremely precise retention time repro-ducibility, which is the basis for allchromatographic measurement.

Agilents proprietary Capillary FlowTechnology provides a new dimensionin chromatography with reliable, leak-free, in-oven capillary connections thatstand up to repeated GC oven cyclingover time. The 7890A GC has enhancedfirmware to extend Capillary Flow capa-bilities and enhanced datasystem soft-ware to simplify set-up and operation ofbackflush. These new tools make iteasier to analyze complex matrices andunknowns, and provide gains in produc-tivity and data integrity for routineanalyses via 2-dimensional heart cut-ting, detector splitting, and columnbackflushing.

The 7890A GC has advanced built-incapabilities to monitor systemresources (counters, electronic logs anddiagnostics). Agilent GC systems areknown for their reliability, ruggedness,and long life. The Agilent 10-year use

guarantee provides greater assurancefor a low-cost of ownership throughoutthe GCs life.

System Capabilities Supports simultaneously:

- Two inlets - Three detectors (third detector

as TCD)- Four detector signals

State-of-the-art detector electronicsand the full-range digital data pathenable peaks to be quantified overthe entire concentration range of thedetector (107 for the FID) in a singlerun.

Full EPC is available for all inlets anddetectors. Control range and resolu-tion are optimized for the specificinlet or detector module.

Up to six EPC modules can beinstalled, providing control of up to16 channels of EPC.

*Using 7890A with EPC (splitless), ALS and Agilent DataSystem for analysis of tetradecane (2 ng to the column).Results may vary with other samples and conditions.

2 Pressure setpoint and contol preci-sion to 0.001 psi provides moreretention time locking precision forlow-pressure applications.

EPC with capillary columns providesfour column flow control modes:constant pressure, ramped pressure(3 ramps), constant flow, or rampedflow (3 ramps). Column average lin-ear velocity is calculated.

Atmospheric pressure and tempera-ture compensation is standard, soresults do not change, even whenthe laboratory environment does.

Low Thermal Mass (LTM) systemcan be added to achieve fastestcycle times via rapid LTM capillarycolumn module heating and cooling.

The LAN interface allows real-timemonitoring of the GC when it is con-nected with Lab Monitor &Diagnostic Software, even whenalso connected to a data system.

One-button access to maintenanceand service modes from the key-board

Preprogrammed leak tests

Automatic Liquid Sampling is fullyintegrated into mainframe control.

Setpoint and automation control canbe done from the local keyboard orvia a networked data system. Clock-time programming can be initiatedfrom the front panel to initiateevents (on/off, method start, etc.) ata future date and time.

A run time deviation log is createdfor each analysis to ensure that allmethod parameters were achievedand maintained.

A full array of traditional gas sam-pling and column switching valvesare available

550 timed events

Display of all GC and ALS setpointsat the GC or data system.

Context-sensitive online help

Column Oven Dimensions: 28 31 16 cm.

Accommodates up to two 105 m 0.530 mm id capillary columns or two10-ft glass packed columns (9 in. coildiameter, 1/4 in. od), or two 20-ftstainless steel packed columns (1/8 in. od).

Operating temperature range suit-able for all columns and chromato-graphic separations. Ambient tem-perature +4 C to 450 C.

- With LN2 cryogenic cooling: 80 to 450 C.

- With CO2 cryogenic cooling: 40 to 450 C.

Temperature setpoint resolution: 0.1 C.

Supports 20 oven ramps with 21plateaus. Negative ramps areallowed.

Maximum achievable temperatureramp rate: 120 C/min (120 V unitsare limited to 75 C/min, see Table 1).

Maximum run time: 999.99 min (16.7 h).

Oven cool down (22 C ambient) 450to 50 C in 4.0 min (3.5 min withoven insert accessory).

Ambient rejection: < 0.01 C per 1 C.

Electronic PneumaticsControl (EPC) Compensation for barometric pres-

sure and ambient temperaturechanges is standard.

Pressure setpoints may be adjustedby increments of 0.001 psi, with typi-cal control 0.001 for the range0.000 to 99.999 psi; 0.01 psi for therange 100.00 psi to 150.00 psi

User may select pressure units aspsi, kPa, or bar.

Pressure/flow ramps: Three maximum.

Carrier and makeup gas settingsselectable for He, H2, N2, andargon/methane.

Flow or pressure setpoints for eachinlet or detector parameter with bothAgilent 7890A and AgilentChemStations.

Constant flow mode is availablewhen capillary column dimensionsare entered into the 7890A.

Split/splitless, Multimode, and PTVinlets have flow sensors for the con-trol of split ratio.

Inlet modules Pressure sensors: Accuracy: < 2% full scale, Repeatability: < 0.05 psi, Temperature coeffi-cient: < 0.01 psi/C, Drift: < 0.1 psi/6 months.

Flow sensors: Accuracy: < 5%depending on carrier gas,Repeatability: < 0.35% of setpoint,

Table 1. Typical 7890A GC Oven Ramp Rates

Temperature 120 V Oven* Fast ramp rates** (C/min)range (C) rates (C/min) Dual-Channel Single-Channel***

50 to 70 75 120 12070 to 115 45 95 120115 to 175 40 65 110175 to 300 30 45 80300 to 450 20 35 65

* Results obtained with line voltage maintained at 120V** Fast ramp rates require power > 200 volts at > 15 Amps.***Requires G2646-60500 oven insert accessory.

3Temperature Coefficient < 0.20 mL/min (NTP)* per C forHe or H2; < 0.05 mL/min NTP perC for N2 or Ar/CH4.

Detector modules: Accuracy: < 3 mL/min NTP or 7%of setpoint, Repeatability: < 0.35% of setpoint

*NTP = 25 C and 1 atmosphere

Inlets Maximum of two inlets installed

EPC compensated for atmosphericpressure and temperature variation

Inlets available:

- Packed purged injection port(PPIP)

- Split/splitless capillary inlet(S/SL)

- Multimode inlet

- Temperature-programmable coolon-column (PCOC)

- Programmable temperature vapor-izer (PTV)

- Volatiles inlet (VI)

S/SL Suitable for all capillary columns

(50 m to 530 m id).

Split ratios up to 7,500:1 to avoidcolumn overload. Setting split ratios(particularly low split ratios) is limit-ed by column parameters and con-trol of system flows (particularly lowsystem flows).

Splitless mode for trace analysis.Pressure-pulsed splitless is easilyaccessible for best performance.

Maximum temperature: 400 C.

EPC available in two pressureranges: 0 to 100 psig (0 to 680 kPa)for best control for columns 0.200 mm diameter; 0 to 150 psigfor columns < 0.200 mm diameter.

Gas saver mode to reduce gas consumption without compromising performance.

Electronic septum purge flow con-trol to eliminate ghost peaks.

Total flow setting range: 0 to 200 mL/min N20 to 1,250 mL/min H2 or He

Turn top inlet sealing system is builtin standard with each 7890A S/SLinlet for quick, easy, injector linerchanges

Multimode Inlet Provides the flexibility of a standard

Agilent split/splitless inlet, com-bined with temperature programma-ble capabilities which allow forlarge volume injection. Also sup-ports cool injections for improvedsignal response.

Temperature control: LN2 (to 160 C), LCO2 (to 70 C), air cool-ing (to ambient +10 C with oventemperature < 50 C) (due to highconsumption, air cooling with cylin-ders is not advised). Temperatureprogramming of up to 10 ramps atup to 900 C/min. Maximum tem-perature: 450 C.

Injection modes:

- Hot or cold split/splitless

- Pulsed split/splitless

- Solvent vent

- Direct

Suitable for all capillary columns(50 m to 530 m)

EPC pressure range (psig): 0 to 100 psig

Split ratio: up to 7500 to 1 to avoidcolumn overload. Setting splitratios (particularly low split ratios)is limited by column parametersand control of system flows (partic-ularly low system flows).

Splitless mode for trace analysis.Pressure pulsed splitless is easily

accessible for improved perfor-mance.

Electronic septum purge flow control

Compatible with Merlin Microsealseptum

Setup of parameters facilitated withAgilent Solvent EliminationCalculator

Total flow setting range:

- 0 to 200 mL / min N2- 0 to 1,250 ml/min H2 or He

Turn-top inlet sealing system is builtin standard with each 7890AMultimode inlet for quick, easy injec-tor liner changes

PCOC Direct injection onto cool capillary

column ensures quantitative sampletransfer with no thermal degradation.

Automatic liquid injection sup-ported directly onto columns 0.250 mm id.

Maximum temperature: 450 C.Temperature programming in 3 ramps or tracking oven. Subambient control to 40 C is optional.

Electronic pressure control range: 0 to 100 psig.

Electronic septum purge flow con-trol.

Optional solvent vapor exit for large-volume injections.

- Electronically controlled, inert,three-way valve allows solventventing.

- Includes software for method optimization.

- Preassembled retention gaps/ventline/analytical column for easyinstallation.

headspace, purge and trap, or ther-mal desorption samplers.

Three modes for optimized sampleintroduction: split (up to 100:1 splitratio), splitless, and direct.

Optimized EPC (H2 or He carrier, 0.00 to 100 psig pressure control, 0.0 to 100 mL/min flow control).


Silcosteel treated flow path pro-vides inert surface for minimumcomponent adsorption.

Maximum temperature: 400 C.

Detectors Electronic pneumatics control and

electronic on/off for all detectorgases.

EPC compensated for atmosphericpressure and temperature variation.

Detectors available:

FID Flame ionization detector (FID) that

responds to most organic com-pounds.

Minimum detectable level (for tride-cane): < 1.5 pg C/s

Linear dynamic range: >107 ( 10%).Full-range digital data path enablespeaks to be quantified over theentire 107 concentration range in asingle run.

Data rates up to 500 Hz accommo-date peaks as narrow as 10 msec athalf height.

Standard electronic pneumatic con-trol for three gases:

- Air: 0 to 800 mL/min

- H2 : 0 to 100 mL/min

- Makeup gas (N2 or He): 0 to 100 mL/min

Available in two versions: capillarycolumn optimized or adaptable foreither packed or capillary columns.

Flameout detection and automaticreignition

450 C maximum operating tempera-ture

TCD Thermal conductivity detector (TCD),

a universal detector that responds toall compounds, excluding the carriergas.

Minimum detectable level: 400 pgtridecane/mL with He carrier. (Thisvalue may be affected by laboratoryenvironment).

Linear dynamic range: > 105 5%

Unique fluidic switching design pro-vides rapid stabilization from turn-on, low-drift performance.

Signal polarity can be run-pro-grammed for components havinghigher thermal conductivity than thecarrier gas.

Maximum temperature: 400 C

Standard EPC for 2 gases (He, H2, orN2 matched to carrier gas type)

Make-up gas: 0 to 12 mL/min

Reference gas: 0 to 100 mL/min

The 7890A GC can accommodate athird detector as TCD located on theleft-hand side of the GC.

Micro-ECD Micro-electron capture detector

(micro-ECD), a very sensitive detec-tor for electrophilic compounds suchas halogenated organic compounds.

Minimum detectable level:< 5.5 fg/mL lindaneAt standard checkout conditions,with a detector temperature of 300 C and flow to the detector(makeup plus column) of 30 mL/min, this is equivalent to 5.5 fg/sec.

Proprietary signal linearization.Linear dynamic range: > 5 104 withlindane

Data acquisition rate: up to 50 Hz

PPIP Direct injection onto packed and

wide-bore capillary columns.

Electronic flow/pressure control: 0 to 100 psig pressure range, 0.0 to200.0 mL/min flow range. Rangesare chosen to provide optimum per-formance over normal packed col-umn setpoint ranges.


400 C maximum operating temperature.

Adapters included for 1/4-in. and1/8-in. packed columns, and 0.530-mm capillary columns.

PTV Supports hot/cold split and splitless

modes as well as large volume injec-tions.

Temperature control: either LN2 (to160 C) or LCO2 (to 65 C) cooling.Temperature programming of up to 3 ramps at up to 720 C/min.Maximum temperature: 450 C.

EPC pressure range 0 to 100 psig.

Split ratio up to 7,500:1. Setting splitratios (particularly low split ratios) islimited by column parameters andcontrol of system flows (particularlylow system flows).


Choice of Gerstel septumless heador Merlin Microseal septum head.

450 C maximum operating temperature.

Total flow setting range:

- 0 to 200 mL/min N2- 0 to 1,250 mL/min H2 or He

VI Very low volume (32 L) interface

suitable for gas or prevaporized sam-ples. Recommended for use with

4

5 Uses emission of < 15 mCi 63Ni asthe electron source.

Unique micro-cell design minimizescontamination and optimizes sensi-tivity.


Standard EPC makeup gas types:argon/5% methane or nitrogen; 0 to 150 mL/min

NPD Nitrogen-phosphorus detector

(NPD), a detector specific to nitro-gen or phosphorus-containing com-pounds.

NPD available with one of twobeads, Blos (glass) bead or whiteceramic bead (legacy offering)

Compared to the legacy whiteceramic bead, the Blos bead offers:

- Longer lifetime

- More stable operation during the beads lifetime

MDL: < 0.1 pg N/s, < 0.03 pg P/swith azobenzene/malathion/octadecane mixture with Blos bead

MDL: < 0.4 pg N/s, < 0.2 pg P/swith azobenzene/malathion/octadecane mixture with whiteceramic bead

Dynamic range: > 105 N, > 105 Pwith azobenzene/malathion mixturewith Blos or white ceramic bead

Selectivity: 25,000 to 1 g N/g C,200,000 to 1 g P/g C with azoben-zene/malathion/octadecane mixturewith Blos bead

Selectivity: 25,000 to 1 g N/g C,75,000 to 1 g P/g C with azoben-zene/malathion/octadecane mixturewith white ceramic bead


Standard EPC for three gases:


- H2: 0 to 30 mL/min

- Makeup gas: 0 to 100 mL/min

Available for packed/capillarycolumns or optimized for capillarycolumns


FPD Single-wavelength flame photomet-

ric detector (FPD), or dual-wave-length flame photometric detector(DFPD) a sensitive, specific detec-tor to sulfur- or phosphorus-contain-ing compounds.

MDL: < 60 fg P/s, < 3.6 pg S/s withmethylparathion

Dynamic range: > 103 S, 104 P withmethylparathion

Selectivity: 106 g S/g C, 106 g P/g C


Standard EPC for three gases:


- H2: 0 to 250 mL/min

- Makeup gas: 0 to 130 mL/min

Available in single- or dual-wave-length versions.


Agilent 7890A GCs ability to handle4 signals allows simultaneous use ofDFPD, top-mounted GC detector, andTCD.

SCD (Model 355) Highest sensitivity and selectivity for

sulfur-containing compounds.

MDL: Typical < 0.5 pg/s, dimethylsulfide in toluene

Linear dynamic range: > 104

Selectivity: > 2 x 107 g S/g C

NCD (Model 255) High selectivity for nitrogen-

containing compounds.

MDL: < 3 pg N/s, in both N andnitrosamine modes, 25 ppm N asnitrobenzene in toluene

Linear dynamic range: > 104

Selectivity: > 2 x 107 g N/g C (selec-tivity in nitrosamine mode is matrixdependent)

See Agilent Sulfur ChemiluminescenceDetector and Nitrogen Chemilumin-escence Detector Specification Guidefor additional information regarding per-formance and physical and environ-mental specifications.

MSDSee 5975 Series MSD specifications. See 7000A Triple Quadrupole GC/MSspecifications.

Specialized detectors are availablethrough Agilent Channel Partnersincluding: atomic emission, heliumonization, and pulsed discharge ionization.

Auxiliary EPC DevicesThe 7890A GC has two positions forauxilary EPC devices located on theback of the GC. Each position can beany combination of auxiliary EPC orpneumatics control module.

Note: The communication for a thirddetector as TCD EPC module (locatedon the left side of the GC) interfaces viaone of these auxiliary EPC module posi-tions. If a third detector (TCD) isinstalled, one of these auxiliary posi-tions is thus taken.

Auxiliary EPC Module Three channels of pressure

control

EPC compensated for atmosphericpressure and temperature variationwhen connected to a user-definedcapillary column

Psig (gauge) and psia (absolute)pressure control

6 Forward pressure regulated

Maximum of 2 auxiliary EPC mod-ules per GC

Pneumatics Control Module (PCM) 2 channels for operation

EPC compensated for atmosphericpressure and temperature variationwhen connected to a user-definedcapillary column

First channel:

- Pressure or flow control

- Psig (gauge) and psia (absolute)pressure control

- Forward pressure regulated

Second channel:

- Pressure control

- Psig (gauge) and psia (absolute)pressure control

- Forward pressure or back pressure regulated

PCM can be located in either/bothinlet EPC positions, and ineither/both auxiliary positions onthe back of the 7890A GC

Maximum of 3 PCMs per GC

Capillary Flow TechnologyAgilents proprietary Capillary FlowTechnology provides devices with reli-able, leak-free, in-oven capillary con-nections to help analyze complex sam-ples and provide gains in productivity.Devices feature:

Photolithographic chemical millingfor low dead volume flow pathways

Diffusion bonding to form a singleflow plate

Credit card profile for fast thermalresponse

Projection welded connections forleak-tight fittings

Deactivation of all internal surfaces

in the sample path for inertness

All of the following purged CapillaryFlow devices require one channel froman auxiliary EPC or PCM module.

Purged capillary flow devices, such asthe Deans switch, purged effluent split-ters, and QuickSwap, introduce an addi-tional flow in the sample stream. Fordetectors that operate at low flowrates, like the MSD and TCD, somedecrease in sensitivity will occur.

Deans SwitchDeans switching provides additionalselectivity using 2-dimensional GCanalysis. Peaks of interest that may becoeluting on one column are diverted toa separate column of different station-ary phase. This technique can alsoreduce maintenance costs by havingtroublesome solvents or other compo-nents bypass detectors or columns.

Dimensions:65 mm x 31 mm x 1 mm(65 mm x 31 mm x 11 mm, includingweldment connectors with tubing toreach through top of oven.)

Weight: 30 grams, not including con-nector tubing.

Purged Effluent SplittersA 3-way purged effluent splitter sendscolumn effluent to three detectors,even an MSD. More information can beobtained in a single run to help locatetarget peaks in unknowns. A 2-waypurged effluent splitter version is alsoavailable.

Dimensions:65 mm x 31 mm x 1 mm(65 mm x 31 mm x 11 mm, includingweldment connectors with tubing toreach through top of oven.)


QuickSwapThe QuickSwap device, for GC/MS,allows you to change a column or per-form inlet maintenance without ventingthe MSD, saving a considerableamount of downtime.

Dimensions:31 mm x 16 mm x 1 mm(31 mm x 16 mm x 22 mm, includingweldment connectors)


BackflushEach of the above purged CapillaryFlow devices also provides the abilityto backflush. By reversing column flowimmediately after the last compound ofinterest has eluted, you can eliminatelong bake-out times for highly retained(or high-boiling) contaminants, therebyshortening cycle times and protectingthe column and detector. As backflushoccurs after peaks of interest haveeluted, the chromatographic methodfor peaks of interest does not need tochange. Backflush is available whenthe column is attached to a split/split-less, volatiles interface, Multimode, orPTV inlet.

The 7890A GC firmware has been opti-mized for backflush operation:

Displays positive and negative flows

Inlet/outlet pressures settable tothe limits of the controlling EPCdevices.

EPC can be introduced at any col-umn or restrictor connection

Capillary Flow configuration of up tosix columns/restrictors

Agilent GC MultitechniqueChemStation, EZChrom Elite data sys-tem, and GC/MSD ChemStation nowinclude user-interface screens to sim-plify backflush set-up and operationwith the 7890A GC.

7ALS Interface Module 7693A ALS Interface standard.

Provides power and communicationsfor up to two 7693A automatic injec-tors, one automatic sampler tray,and one heater/mixer/bar codereader.

7683 ALS Interface standard.Provides power and communicationsfor up to two 7683 automatic injec-tors, one automatic sampler tray,and one bar code reader.

Injector and tray install easily with-out the need for alignment.

Data Communications LAN

Two analog output channels (1-mV, 1-V, and 10-V output avail-able) as standard

Remote start/stop

Keyboard control of the AgilentAutomatic Liquid Sampler (ALS)

Storage of 10 methods

Storage of five ALS sequences

Binary-coded decimal input for astream selection valve

Maintenance and SupportServices Remote diagnostics

Performance verification services

EnvironmentalConditions/Safety andRegulatory CertificationsThe instrument is designed and manu-factured under a quality system regis-tered to ISO 9001. The instrument com-plies with international regulatory, safe-ty, and electromagnetic compatibilityrequirements. The specifications aremore conservative than actual test con-ditions. In addition, further testing wasdone under Agilent standards to ensure

operation after delivery and long-termusage. See http//www.chem.agilent.com/cag/aboutapg/aboutQuality.htmlfor further information and typicalproduct testing.

Ambient operating temperature: 15 C to 35 C

Ambient operating humidity: 5% to 95%

Storage extremes: 40 C to 70 C

Line voltage requirements: 10% of nominal

Conforms to the following safetystandards:

- Canadian Standards Association (CSA): C22.2 No. 1010

- CSA/Nationally Recognized Test Laboratory (NRTL): UL 3101

- International Electrotechnical Commission (IEC): 61010-1

- EuroNorm (EN): 61010-1

Conforms to the following regulations on ElectromagneticCompatibility (EMC) and RadioFrequency Interference (RFI):

- CISPR 11/EN 55011: Group 1 Class A

- IEC/EN 61326

Designed and manufactured undera quality system registered to ISO9001, Declaration of Conformityavailable.

Other Specifications Height: 49 cm (19.2 in.)

Width: 58 cm (22.9 in.) with EPCinlet and detectors; 68 cm (26.8 in.) with third detector as TCDor with certain valving optionsmounted on left-hand side of GC

Depth: 51 cm (20.2 in.) Typical weight: 49 kg (108 lb)

Four internal 24-volt connections(up to 150 mA)

Two external 24-volt connections (upto 150 mA)

Two on/off contact closures (48 V, 250 mA max)

550 timed events via data system. 50 timed events via GC keyboard.

Support for up to 8 valves.

- Valves 1 to 4, 12V DC 13 watt in a heated valve box

- Valves 5 to 6, 24 V DC 100 mA unheated, for low power valve applications

- Valves 7 to 8, externally powered as a remote event from separate contact closure

Independent heated zones, notincluding oven: six (two inlets, twodetectors, and two auxillary). Thirddetector as TCD can utilize any avail-able zone from inlet or auxillaryzones.

Maximum operating teperatures forauxiliary zones: 400 C

References1. A Guide to Interpreting Detector

Specifications for GasChromatography. AgilentTechnologies, publication 5989-3423EN

2. The Importance of Area andRetention Time Precision in GasChromatography. AgilentTechnologies, publication 5989-3425EN

For More InformationFor more information on our productsand services, visit our Web site atwww.agilent.com/chem.

www.agilent.com/chem

Silcosteel is a registered trademark of the RestekCorporation.

Merlin Microseal is a registered trademark of GerstelGmbH & Co. KG

Agilent shall not be liable for errors contained herein orfor incidental or consequential damages in connectionwith the furnishing, performance, or use of this material.

Information, descriptions, and specifications in this publication are subject to change without notice.

Agilent Technologies, Inc., 2011Printed in the USADecember 1, 20115989-6317EN

agilent data sheet 5989-6317en

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