A Small Mass Spectrometer for Residual Gas Analysis

Evaluation of small mass spectrometer systems for permanent gas analysis.

This work is aimed at understanding the aspects of designing a miniature mass spectrometer (MS) system. Several types of small MS systems are evaluated and discussed, including linear quadrupole, quadrupole ion trap, time of flight, and sector. Analysis of hydrogen, helium, oxygen, and argon in a nitrogen background with the concentrations of the components of interest ranging from 0 to 5000 pa...

The Gas Chromatograph Mass Spectrometer for the Huygens Probe

The Gas Chromatograph Mass Spectrometer (GCMS) on the Huygens Probe will measure the chemical composition of Titan’s atmosphere from 170 km altitude (∼1 hPa) to the surface (∼1500 hPa) and determine the isotope ratios of the major gaseous constituents. The GCMS will also analyze gas samples from the Aerosol Collector Pyrolyser (ACP) and may be able to investigate the composition (including isot...

Calibration effects during natural gas analysis using a quadrupole mass spectrometer

Quadrupole mass spectrometry (QMS) is regularly used for online monitoring of gaseous systems. With the advent of miniature QMS, it is possible to apply this capability to the analysis of gas samples extracted from drilling mud during exploration and development of oil and gas fields. QMS analysis can provide rapid compositional data for a range of hydrocarbons, providing early recognition of p...

Gas flow through the mass spectrometer viscous leak.

Clinical applications of gas chromatograph/mass spectrometer/computer systems.

Gas chromatograph/mass spectrometer/computer systems can be used to quantify a wide variety of compounds of clinical interest. A quadrupole instrument operated in the chemical ionization (Cl) mode was used in these studies. Because of the sensitivity and specificity of selective ion detection, it is possible to make measurements routinely in the nanogram to picogram range, with 0.1-1.0 ml sampl...