顶空气相色谱-质谱联用法测定卫生巾中3种二甲苯同分异构体

Determination of Xylene and Its Isomer in Sanitary Absorbent Pads byHeadspace Gas Chromatography-mass Spectrometry

文章建立了可直接快速测定卫生巾中二甲苯同分异构体含量的高效全自动顶空分析系统-高效气相色谱联用法-高效气相质谱联用法(HS-GC-MS)谱法。试验发现三种二甲苯同分异构体均有良好的线性结合度,相关系数在0.9992~0.997,方法的定量限差系数(S/N=10)为0.001 mg/kg;样品的平均添加及回收率在80.4%~99.7%,相对标准偏差(RSD,N=6)不高于8.0%。该检测方法仪器操作简单、效果好、结果准确可靠,可用于环境卫生中二甲苯同分异构体含量的检测。

A headspace-gas chromatography-mass spectrometry(HS-GC-MS)method for the determination of xylene in sanitary napkins is established in this paper.The results shows that three kinds of xylene isomers have good linearity and the correlation coefficients are between 0.9992 and 0.997.The quantitative limit(S/N=10)of the method is 0.001 mg/kg.The average recovery rates are from 80.4%to 99.7%and the relative standard deviations(RSD,n=6)are beyond 8.0%.The method is simple,reproducible,accurate and reliable.It can be used for the determination of xylene in sanitary napkins.