This document specifies a vehicle-mounted dual-channel mass spectrometer method for the determination of 80 volatile organic compounds (VOCs) such as toluene in ambient air. This document is suitable for on-site emergency monitoring of 80 types of volatile organic compounds such as toluene and rapid screening of volatile organic compounds in ambient air and unorganized waste gas. Other volatile organic compounds can also be measured using this document if they pass the method applicability verification. Using the injection volume specified in this document, in the direct mass spectrometry mode, the method detection limit is 66 μg/m3, and the lower determination limit is 264 μg/m3; in the gas-mass spectrometry coupled mode, the method detection limit is 3 μg/m3~13 μg/m3 m3, the lower limit of determination is 12 μg/m3~52 μg/m3. Comply with the requirements of Appendix A.1 and A.2.
T/GXAS 496-2023 history
2023T/GXAS 496-2023 Ambient air — Determination of volatile organic compounds — Vehicular mass spectrometry