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York: Gas Chromatography MS (GCMS)

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The York Thermal Desorption-Gas Chromatograph-Mass Spectrometer (GCMS) is an Agilent 7890GC-5977MS with a Markes International TT24-7 thermal desorption unit. The output includes mixing ratios of a wide range of volatile organic compounds (VOCs), including halomethanes and hydrocarbons.

The sampling frequency is approximately 5 min and every valid sample will be part of the dataset; no averaging done.

This GC-MS is both deployed on measurement campaigns and operated in the Lab at York University to analyse samples collected elsewhere in WAS sample bottles (particularly samples collected on board the FAAM BAe-146 aircraft).
The air sample stream passes through a water removal system before entering the thermal desorption unit that is coupled to the GC-MS. The Mass Spectrometer can be run in scan or selected ion monitoring mode depending on the focus of the campaign and species and on required sensitivity.

The instrument is calibrated regularly using a mixed gas standard that varies depending on the requirements of the campaign

Abbreviation: york-gcms
Keywords: benzene, toluene, isoprene, halomethanes, GC-MS, CH2BrCl, CHCl3, CH2Br2, CHBrCl2, CHBr2Cl, CHBr3

keywords:      benzene, toluene, isoprene, halomethanes, GC-MS, CH2BrCl,CHCl3,CH2Br2,CHBrCl2,CHBr2Cl,CHBr3
instrumentType:      Gas Chromatograph

Instrument: York/UEA/UFAM: Whole Air Sample bottles (WAS)

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Metadata document

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