顶空固相微萃取–气相色谱–质谱法检测絮用纤维中有机挥发物

采用顶空固相微萃取–气相色谱–质谱联用法测定絮用纤维中甲苯、乙烯基环己烯、1,3-丁二烯等29种常见有机挥发物的含量。样品在120℃平衡20 min,然后固相微萃取30 min,在250℃的进样口温度下解吸10min。29种有机挥发物在检测范围内均有良好的线性,线性相关系数r≥0.99,检出限为0.000 5~0.016 mg/m~2。3个添加标水平下平均加标回收率为88.4%~113.4%,测量结果的相对标准偏差小于11%(n=6)。方法快速、灵敏,适用于絮用纤维中有机挥发物快速检测。

Determination of Volatile Organic Compounds in Wadding Fiber by Headspace Solid Phase Microtraction-GC-MS

A method based on headspace solid phase microtraction-gas chromatography-mass spectrometry was developed for the determination of 29 kinds volatile organic compounds such as toluene,vinyl cyclohexene, 1,3-butadiene and so on inwaddingfiber. Samples were heated at 120℃for 20 min,and solid phase was micro extracted for 30 min, then the solid phase microextractionfiber head was desorbed at 250℃for 10 min. Twenty nine volatile organic compounds calibration curves showed good linearity in wide concentration range, with linear correlation coefficients not less than 0.99, and the detection limits were 0.0005-0.016 mg/m2. The average recoveries of target compounds spiked at three concentration levels were in the range of 88.4%-113.4% with the relative standard deviations of detection results less than 11%(n=6). The method is fast,sensitive,and it is suitable for the determination of VOCs in wadding fiber.