摘要
用五段分级采样器采集太原某焦化厂厂区大气颗粒物，用液相色谱测定不同粒径颗粒物上５种多环芳烃（ＰＡＨ）的含量，并用Ａｍｅｓ试验及ＣＨＬ细胞姐妹染色单体互换（ＳＣＥ）试验，观察不同粒径颗粒提取物的致突变性。结果表明５种ＰＡＨ浓度均很高，芘为１４．８９μｇ／１００ｍ３、为１９．３５μｇ／１００ｍ３、苯并（ａ）蒽（ＢａＡ）为１８．９μｇ／１００ｍ３、为１１４．６７μｇ／１００ｍ３、苯并（ａ）芘（ＢａＰ）为１５．９μｇ／１００ｍ３。４７～７０％的ＰＡＨ富集在≤２μｍ细颗粒上，其质量中值直径芘、、ＢａＡ、、ＢａＰ分别为２．２、２．１、１．６、１．９、１．３。Ａｍｅｓ试验和ＳＣＥ试验结果均表明，分级颗粒粒径愈小其提取物致突变作用愈强。
Airboren particles samples were collected at coking plantin Taiyuan using five-stage classification air samples. Theconcentratiom of five PAHs were determined by the high performance liquid chromatography. The mutagenicity was studied by the Ames assay and SCEs test in CHL cells. The results indicated the concentration of five PAHs in particleswere high. 47-70 percent PAHs were concentrated on theparticles≤μm. MMD of them were 2. 2 (Pyrene), 2. 1 (Chrysene). 1. 6 (Benz(a) anthracene), 1. 9 (Perylene)and 1. 3 (Benzo (a) pyrene). The results in Ames assay and SCEs testshowed that all the extracts from various size airborne particles were mutagenicity and the smaller the st;. of particleswas, the stronger the mutagenicity induced was.
