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气相色谱检测车间空气苯的采样目前有注射器采样（集气法），活性炭管采样（碳管法）和无动力有机蒸气采样器（碳膜法）等3种方法。为比较3种采样方法的优劣和实用性，我们在某彩印厂的彩印机旁进行现场监测，现将结果报告如下。一、材料与方法1．采样方法：（l）集气法：取100
There are three methods for sampling benzene in the air of the workshop: gas sampling, gas sampling (carbon tube method) and non-powered organic vapor sampler (carbon membrane method). To compare the merits and demerits of the three sampling methods and practicality, we carried out on-site monitoring next to the color printing machine of a color printing factory. The results are reported as follows. First, materials and methods 1. Sampling methods: (l) Gathering method: take 100