论文部分内容阅读
通过对前处理方法的比较,选择了快速溶剂萃取作为可吸入颗粒物中多环芳烃的提取方式,并且将ASE的萃取条件作了优化实验,确定ASE的优化结果为DCM:HEX=2:1,萃取温度为120℃,萃取压力为10.34 MPa。处理完的样品上气相色谱质谱-质谱测定,得到空白样品中24种PAHs均有检出,实际样品中的含量均低于10 ng/m L,6种替代物的标准曲线的相关系数在0.999以上,24种PAHs标准样品作了3个不同浓度范围的标准曲线,相关系数均在0.99以上。空白加标实验中得到6种替代物的回收率在58.7%~108.2%之间,24种PAHs的平均回收率在88.3%~104.0%之间,相对标准偏差均低于9.0%。样品加标实验中6种替代物的加标回收率在60.0%~106.5%之间,24种PAHs的回收率在78.0%~95.0%之间,相对标准偏差均低于6.0%。
Through the comparison of pretreatment methods, rapid solvent extraction was selected as the extraction method of PAHs in respirable particulate matter, and the extraction conditions of ASE were optimized to determine the optimal results of ASE as DCM: HEX = 2: 1, The extraction temperature is 120 ℃ and the extraction pressure is 10.34 MPa. 24 samples of PAHs were detected in the blank samples, the contents of the samples were lower than 10 ng / m L, the correlation coefficients of the standard curve of 6 kinds of substitutes were 0.999 Above, 24 kinds of PAHs standard samples made three different concentration range of the standard curve, the correlation coefficients were above 0.99. The average recoveries of six kinds of PAHs were between 88.3% and 104.0% with the relative standard deviations below 9.0%. The spiked recoveries of six alternatives were between 60.0% and 106.5% in spiked samples, and the recoveries of 24 PAHs were between 78.0% and 95.0% with relative standard deviations below 6.0%.