总烃在本方法中是指G_1-C_8的烃类,通常称为挥发性烃,它以定量或不定量的形式发散到大气中。除工业排放源象炼油厂、焦化厂等外,还来自油漆、印染及引擎排放的废气。有些烃在很低的浓度下就可因光化学作用而形成对人体有害的物质——光化学烟雾。因此在城市大气污染的调查和大气污染对人体健康影 Total hydrocarbons in the present process refers to G1-C-8 hydrocarbons, commonly referred to as volatile hydrocarbons, which are emitted to the atmosphere in quantitative or non-quantitative form. In addition to industrial emission sources such as oil refineries, coking plants, etc., they also come from paint, dyeing, and exhaust emissions from engines. Some hydrocarbons can cause photochemical effects to form harmful substances in the human body, photochemical smog, at very low concentrations. Therefore, the investigation of atmospheric pollution in the city and the impact of atmospheric pollution on human health