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A multi-component gas analyzer system (Multi-GAS) is an instrument package used to take real-time high-resolution measurements of volcanic gases. [1] A Multi-GAS package includes an infrared spectrometer for CO 2, two electrochemical sensors for SO 2 and H 2 S, and pressure–temperature–humidity sensors, all in a weatherproof box.
In mass spectrometry, direct analysis in real time (DART) is an ion source that produces electronically or vibronically excited-state species from gases such as helium, argon, or nitrogen that ionize atmospheric molecules or dopant molecules. The ions generated from atmospheric or dopant molecules undergo ion-molecule reactions with the sample ...
It is the first improved analyzer that is able to detect more than one component of a sample gas at one time. Earlier analyzers were held back by the fact that a particular gas also has lower absorption bands in the infrared. The invention of 1975 has as many detectors as the number of gases to be measured.
In the late 1970s an APCI mass spectrometer system (the TAGA, for Trace Atmospheric Gas Analyzer), mounted in a van for mobile operation, was introduced by SCIEX, [19] [20] providing high sensitivity for monitoring polar organics in ambient air in real time. In 1981 a triple quadrupole mass spectrometer version was produced, allowing real-time ...
Once conditioned, the sample enters a sampling manifold and is measured by various gas analyzers, typically NO x and O 2 (and sometimes CO) for combustion turbines and engines running natural gas or diesel. NO x analyzers typically work using chemiluminescence. O 2 analyzers a magnetic field which attracts O 2 to measure the
Newer gas analyzers can break up the component signals from a complex aroma to identify several gases simultaneously. [2] Metal–oxide–semiconductor (MOS) sensors were introduced in the 1990s. The earliest known MOS gas sensor was demonstrated by G. Sberveglieri, G. Faglia, S. Groppelli, P. Nelli and A. Camanzi in 1990.
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