Rapid Analysis Method for Benzene Series, Methane, and Total Hydrocarbons in Ambient Air

Fugitive emissions of benzene series compounds and total hydrocarbons pose irreversible harm to the ecological environment and human health. The rapid and accurate analysis of these compounds has long been a research focus in ambient air monitoring. A quick method for the analysis of total hydrocarbons, methane, benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene, and styrene was developed using a multi-dimensional gas chromatograph with dual FID detectors. The results show that the target components can be accurately analyzed within 12 minutes with a single injection, and the components exhibit good linearity and repeatability across the measurement range. This method demonstrates excellent detection limits, with accuracy ranging from −7.7% to 0.2%. The method can be applied for on-line calibration of analytical instruments in various spatiotemporal scenarios, showing potential application value in field mobile monitoring of ambient air.