电子废物中酞酸酯的分析

Determination of Phthalates in E-waste Samples

电子废物是一种有用的可再生资源,但不当的处置会对环境产生严重污染。试验建立了用气相色谱-质谱联用选择离子检测(GC-MS-SIM)技术测定电子废物中酞酸酯类污染物的方法。样品经索氏提取,硅胶/氧化铝(2:1)柱净化,用GC-MS法分析。结果表明,6种酞酸酯的平均回收率为86.8%～109.4%;相对标准偏差(RSD)为1.2%～2.1%;DMP、DBP、BBP、DEP、DEHP和DOP的检测限分别为15.0、10.0、4.0、10.0、8.0和10.0ng/g。该方法操作简便,准确度和灵敏度高,可同时测定电子废物中的6种酞酸酯,具有很强的实用性。

E-waste is a useful renewable resource, but improper disposal may cause serious environmental pollution. In this paper, a reliable GC-MSP-SIM method was established for determination of 6 Phthalate Esters （PAEs） in E-waste samples. Samples were extracted with soxhlet extractor, purified with silica / alumina （2：1） column, and determined by GC-MS. The result demonstrated the average recoveries of the 6 phthalates were between 86.8% and 109.4%, the relative standard deviations were between 1.2% and 2.1%.The detection limits were 15.0ng/g for DMP, 10.0 ng/g for DBP, 4.0 ng/g for BBP, 10.0 ng/g for DEP, 8.0 ng/g for DEHP and 10.0 ng/g for DOP, respectively. The method with the advantages of simple operation, high precision and high sensitivity is practical to test 6 phthalates in E-waste samples.