气相色谱-三重四极杆串联质谱法测定硫化胶中双酚A含量

Determination of Bisphenol A Content in Vulcanizate by Gas Chromatography-Triple Quadrupole Tandem Mass Spectrometry

采用气相色谱-三重四极杆串联质谱(GC-MS/MS)法测定硫化胶中双酚A含量,研究样品前处理条件对测试结果的影响,并探讨GC-MS/MS测试的优化条件。结果表明:采用丙酮配置双酚A质量浓度为10~1000μg·L^(-1)的标准工作溶液,所得工作曲线相关因数>0.992,线性相关性良好;该方法检出限为0.1 mg·kg^(-1),定量限为0.3 mg·kg^(-1),0.5,1和5 mg·kg^(-1)三个双酚A添加量下平均回收率在90.9%~105.1%范围内,相对标准偏差均<5%。GC-MS/MS法适用于轮胎不同部位双酚A含量的检测。

Bisphenol A content in vulcanizates was determined with gas chromatography-triple quadrupole tandem mass spectrometry(GC-MS/MS)method.The effects of sample pretreatment conditions on the test results were studied,and the optimal test conditions of GC-MS/MS were discussed.The results showed that by using acetone to prepare a standard solution with a mass concentration of bisphenol A of 10~1000μg·L^(-1),the correlation coefficient of the obtained working curve was larger than 0.992 and the linear relationship was good.The detection limit of this method was 0.1 mg·kg^(-1),the quantitation limit was 0.3 mg·kg^(-1),the average recoveries were in the range of 90.9%~105.1%at three tested addition levels of bisphenol A(0.5,1 and 5 mg·kg^(-1)),and the relative standard deviation was less than 5%.GC-MS/MS method was suitable for the analysis of bisphenol A content in different parts of tires.