热解吸–气质联用法测定纺织品中有机挥发物的含量

Determination of Volatile Organic Compounds in Textiles by Thermal Desorption–GC–MS

采用热解吸-气质联用法测定纺织品中有机挥发物氯乙烯、1，3-丁二烯、甲苯、4-乙烯基环己烯、苯乙烯、4-苯基环己烯的含量。吹扫载气N2流量为30 mL／min，100℃吹扫顶空腔30 min，然后于290℃解吸吸附管10 min。色谱柱为DB-624柱，初始柱温35℃，保持5 min，以10℃／min升至240℃，保持10 min。检测上述6种有机物的线性范围分别为21.13-426.26，21.12-422.49，4.22-211.00，4.10-204.85，2.10-209.70，4.43-221.30μg／mL，线性相关系数均大于0.99。3个添加水平的平均回收率为88.8%-110.2%，测定结果的相对标准偏差为1.95%-6.59%（n=4）。该方法重现性好，测量结果准确，可作为纺织品质量控制的参考方法。

A method based on thermal desorption and gas chromatography mass spectrometry was developed for the determination of volatile organic compounds in textiles such as vinyl chloride, 1,3-butadiene, toluene, 4-vinyl-cyclohexene, styrene and 4-phenyl-1-cyclohexene. N2 purged headspace chamber at 100℃for 30 min at the flow rate of 30 mL/min, and then thermally desorbed adsorbent tube at 290℃for 10 min. Chromatography was carried out on a DB-624 column. An initial oven temperature of 35℃was maintained for 5 min, and then increased to 240℃at 10℃/min for 10 min. The linear range of the six volatile organic compounds were 21.13-426.26, 21.12-422.49, 4.22-211.00, 4.10-204.85, 2.10-209.70, 4.43-221.30μg/mL, respectively, and the linear correlation coefficients were more than 0.99. The average recoveries of target compounds （spiked at three concentration levels） were in the range of 88.8%-110.2%with the relative standard deviations of 1.95%-6.59%（n=4）.This method is reproducible, accurate, and it can be used for quality control method of textiles.