Spectrometry & Spectroscopy, Chromatography

Gas Chromatography Mass Spectrometry (GC/MS) - Agilent Technologies 7890B GC - 240 Ion Trap MS

The Agilent 7890B is a state-of-art gas chromatograph (GC) that provides superior performance for all GC applications with the use of advanced electronic pneumatic control (EPC) modules and high performance GC oven temperature control. The Agilent 240 Ion Trap mass spectrometer (MS), combined with the Agilent 7890B GC, delivers exceptional performance and unsurpassed flexibility with both MS and GC options. The MS is configured in internal mode and provides both electron ionization (EI) and chemical ionization (CI). The 7693 automatic liquid sampler (ALS) works as the interface on 7890B, providing power and communications for one automatic injector and one automatic sampler tray that are easily installed without the need for alignment.


  • Three compartments:
    • 7890B GC System (G3440B)
    • 240 Ion Trap MS System (G3934A)
    • 7693 Automatic Liquid Sampler (G4514A)
  • 7890B GC System:
    • Retention time repeatability < 0.008% or < 0.0008 min
    • Area repeatability < 1% RSD
    • Pressure setpoint and control precision to 0.001 psi
    • Column oven temperature: ambient +4 °C to 450 °C
    • Setpoint resolution: 0.1 °C
    • Maximum ramp rate: 75 °C
    • Cool down (22 °C ambient) from 450 °C to 50 °C in 4 min
    • Reliable, leak-free, in-oven capillary connections by Capillary Flow Technology
    • Micro- Electron Capture Detector (ECD) with EPC module
    • *Radioactive material: use < 15 mCi Ni-63 as the electron source
    • Multimode inlet (MMI) and Split/Splitless capillary inlet (S/SL) with EPC module
    • Carrier gas and auxiliary gas: He
    • Detector gas: argon/methane mixture      
  • 240 Ion Trap MS System:
    • Mass range: 40-1000 Da in 0.1 Da steps (time programmable throughout the run)
    • Scan rate: 5000 or 10000 Da/sec
    • Mass axis stability: ±0.1 Da over 72 hr
    • Operation temperature: up to 250 °C for mass analyzer, up to 120 °C for manifold
    • Electrode surface: SilChrome for maximum inertness
    • Ionization filament current: 10 – 100 µA
    • Maximum ionization time: 65 msec
    • Internal mode electron ionization (EI) and chemical ionization (CI)
    • Detection system:
      • Detector: off-axis design, ±10 kV HED and electron multiplier
      • Analytical linear dynamic range: 10³ to 10⁴
    • Vacuum system:
      • 280 L/s turbomolecular pump
      • Bayard-Alpert ion gauge with thoria-coated iridium filaments
      • DS-102 rotary vane foreline pump, > 95 L/min
      • Foreline pump thermal vacuum gauge
    • Control software: MS Workstation (MSWS)
    • NIST 2014 MS Library Bundle including 243,000 spectra with names, chemical structures, and retention indices


Materials Characterization Laboratory
Furnas Hall room #109/110
University at Buffalo North Campus
Buffalo, NY 14260


Category C Rates

  • Internal Academic: $15 per hour
  • External Academic: $27 per hour
  • Industry: $60 per hour
For general inquiries, contact:

Donald J. Goralski
Director, Shared Instrumentation Laboratories
(716) 645-5151

For technical inquiries, contact:

Zongmin (Shirley) Bei, PhD
Senior Research Support Specialist
Shared Instrumentation Laboratories (716) 645-5165