Determination of Atmospheric Carbonyl Sulfide by Isotope Dilution Gas Chromatography/Mass Spectrometry

Abstract

A gas chromatography/mass spectrometry (GC/MS) method for determining atmospheric carbonyl sulfide (OCS) with a precision better than 2% Is reported. High precision and Insensitivity to sample loss and changes In detector response were achieved by using isotopically labeled OCS as an internal standard. Tenax, Molecular Sieve 5A, Carbosleve B, and Carbosleve S were evaluated for collecting atmospheric OCS. Molecular Sieve 5A provided the best trapping and recovery efficiencies. © 1987, American Chemical Society. All rights reserved.