The Agilent 7890B is a highly reliable and widely used high-performance Gas Chromatograph (GC) system. It features 5th-generation Electronic Pneumatics Control (EPC), highly precise oven temperature programming, and support for dual-inlet/multi-detector configurations. The 7890B incorporates integrated sleep/wake modes and optional helium conservation modules to reduce operating costs without compromising retention time repeatability or analytical performance.
Specifications
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 15 to 35 |
| Dimensions (W×H×D) | 580 × 490 × 510 |
| Weight | 49 |
General System Specifications
| Parameter | Value |
|---|---|
| Supported Inlet Channels | Up to 2 |
| Maximum Heated Zones | 6 independent heated zones (2 inlets, 2 detectors, 2 auxiliary; excluding oven) |
| Retention Time Repeatability | < 0.0008 min (< 0.008%) |
Column Oven
| Parameter | Value |
|---|---|
| Oven Dimensions (W×H×D) | 28 × 31 × 16 cm |
| Operating Temperature Range | Ambient +4 °C to 450 °C |
| Cryogenic Cooling Options | Liquid Nitrogen (-80 °C to 450 °C) or Liquid CO2 (-40 °C to 450 °C) |
| Temperature Setpoint Resolution | 0.1 °C |
| Maximum Number of Temperature Ramps | 20 ramps (21 plateaus) |
| Maximum Temperature Programming Rate | Up to 120 °C/min (240V oven configuration) |
| Oven Cool-down Time | 4.0 minutes (450 °C to 50 °C at 22 °C ambient) |
| Column Capacity | Accommodates up to two 105 m capillary columns |
Pneumatics and Flow Control (EPC)
| Parameter | Value |
|---|---|
| Pressure Setpoint Resolution | 0.001 psi |
| Barometric Pressure Compensation | Standard |
| Ambient Temperature Compensation | Standard |
Inlets (Injectors)
| Parameter | Value |
|---|---|
| Split Ratio Range | Up to 7500:1 (for Split/Splitless capillary inlet) |
| Available Inlet Types | Split/Splitless (SSL), Multimode Inlet (MMI), Purged Packed (PPI), Programmable Temperature Vaporizing (PTV), Volatiles Interface (VI), Cool On-Column (COC) |
Detectors
| Parameter | Value |
|---|---|
| Available Detector Types | FID, TCD, micro-ECD, NPD, FPD+, SCD, NCD, MS |
| FID Data Acquisition Rate | Up to 500 Hz |
| FID Linear Dynamic Range | > 10^7 |
| TCD Minimum Detectable Level (MDL) | < 400 pg tridecane/mL |
| TCD Linear Dynamic Range | 10^5 |
| FID Maximum Operating Temperature | 450 °C |
| TCD Maximum Operating Temperature | 400 °C |
Autosampler and Sample Handling
| Parameter | Value |
|---|---|
| Compatible Liquid Autosamplers | Agilent 7693A, 7650A, CTC PAL3 |
| Headspace Sampler Compatibility | Agilent 7697A, 8697 |
Data Communications and Control
| Parameter | Value |
|---|---|
| Compatible Chromatography Data Systems (CDS) | Agilent OpenLab CDS, ChemStation, EZChrom, MassHunter |
Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Humidity Range | 5% to 95% (non-condensing) |
Power Requirements
| Parameter | Value |
|---|---|
| Maximum Power Consumption | 2250 VA (120V configuration) / 2950 VA (240V fast-heating configuration) |
Pneumatics
| Parameter | Value |
|---|---|
| Auxiliary EPC Channels | Up to 9 channels (via up to 3 optional modules) |
Software & Features
| Parameter | Value |
|---|---|
| Sleep/Wake Mode | Supported (user-programmable for gas and power conservation) |
| Early Maintenance Feedback (EMF) | Supported |
Accessories
| Parameter | Value |
|---|---|
| Capillary Flow Technology (CFT) | Supported (Deans switch, splitters, purges, backflush) |
Oven
| Parameter | Value |
|---|---|
| Oven Maximum Run Time | 999.99 minutes |
Inlets
| Parameter | Value |
|---|---|
| Split/Splitless (S/SL) Inlet Maximum Operating Temperature | 400 °C |
| Multimode Inlet (MMI) Temperature Range | -160 °C to 600 °C (with liquid N2 cooling) |
Inputs & Outputs
| Parameter | Value |
|---|---|
| Analog Signal Outputs | 2 channels (1 mV, 1 V, 10 V scales) |
System Compatibility
| Parameter | Value |
|---|---|
| Compatible Mass Spectrometers | Agilent 5975, 5977, 7000, 7010, and 7200 Series |
Safety
| Parameter | Value |
|---|---|
| Hydrogen Safety | Optional built-in hydrogen sensor module |
Technology
Gas Chromatography (GC)
Applications
Analytical chemistry, environmental analysis, petrochemicals, pharmaceuticals, food safety, forensics, and materials testing