用活性炭吸附空气中有机物苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯,二硫化碳解吸后用毛细管气相色谱法同时测定,各组分线性响应良好,曲线相关系数均大于0.995；灵敏度高,检出限在0.01 ～0.03 μg/ml之间；回收率在82.4％ ～ 105.8％之间.苯、甲苯、二甲苯均未超过GB 16297-1996中规定的0.5、0.3、1.5mg/m3,也未超过新污染源大气污染物排放限值中规定的0.4、2.4、1.2mg/m3,苯乙烯浓度也远小于恶臭污染物排放标准GB 14554-93中规定的一级标准3.0mg/m3,虽然工业园区及其周边大气环境均能检测出苯系物,但都在国家相关标准范围内.%A quick and effective determination method of seven benzene series (benzene, toluene, ethyl benzene, xylene, styrene) in air has been established. The sample was collected with activated carbon and dissolved with 2. Oml CS;, 1. Ojil of the solution was injected on a HP - INNOWAX capillary column (30m ×0. 32 I. d.×x0. 25μm) and determined by GC - FIQ. Seven kinds of benzene series were separated each other completely. The detected limits in sample were 0.01 - 0. 03μg/ml. The recoveries were from 82. 4% to 105. 8% . This method is simple, rapid and sensitive. Although the seven benzene series were all detected,They were all under national standard.
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