地毯中全氟辛烷磺酰基化合物(PFOS)的测定方法研究

本文利用高效液相色谱-电喷雾串联质谱(HPLC-ESI-MS/MS)技术研究地毯中全氟辛烷磺酰基化合物(PFOS)的测定方法。地毯样品采用超声波辅助萃取,萃取液经0.2μm有机滤膜过滤后,以42:58(体积比)的甲醇5mmol/L乙酸铵溶液为流动相,经HPLC分离后用多级反应监测(MRM)模式测定。用两个子离子的相对丰度定性,外标法定量。结果表明,PFOS在0.002~0.1mg/L范围内线性良好(r0.9995),回收率大于90%,相对标准偏差小于2%。满足欧盟法规对产品中PFOS的限量检测要求。

Determination of Perfluorooctane Sulfonates(PFOS) in Carpet

A novel method based on high performance liquid chromatography--tandem mass spectrometry（HPLC-ESI- MS/MS）combined with electron spray ionization was developed for quantitative detection of trace perfluorooetane sulfonate （PFOS） in carpet. Carpet samples were extracted by ultrasonic and the extract was fihrated through membrane with diameter of 0.2μm. The filtration liquid was determined by HPLC using 42：58 （by volume） methanol-Smmol/L ammonium acetatesolution as mobile phase. The PFOS was detected under multiple reactions monitoring （MRM） mode. Qualitative analysis of the PFOS could be performed using the relative abundance of two daughter ions of PFOS, and quantitative analysis was conducted with external standard method. The linear calibration curve was obtained in the range of 0.002-0. lmg/L with a correlation coefficient more than 0.9995. The spiked recoveries of PFOS was higher than 90% with RSD less than 2%. The method could be used for PFOS inspection in carpet and demand the limit testing requirement by EU regulations.