气相色谱-质谱法测定塑料制品和电子电气产品中氧化苯乙烯

建立了塑料制品和电子电气产品中氧化苯乙烯的气相色谱-质谱(GC-MS)分析方法。样品经甲醇超声萃取,采用GC-MS的全扫描方式和选择离子监测方式(SIM)对氧化苯乙烯进行定性和定量分析、外标法定量。对萃取溶剂、萃取时间以及色谱条件进行了考察。结果表明:氧化苯乙烯在0.05~10mg/L浓度范围内线性关系良好,相关系数为0.9999,检出限为0.1mg/kg,在0.5、20、100mg/kg添加水平下的回收率为90.5%~120.4%,相对标准偏差(RSD)为0.18%~6.95%。该方法简便、准确性好、灵敏度高,能够满足实际检测工作的需要。

Determination of Styrene Oxide in Plastic,Electrical and Electronic Products by Gas Chromatography-Mass Spectrometry

A method has been developed for the determination of styrene oxide(SO) in plastic,electrical and electronic products by gas chromatography-mass spectrometry.The sample was extracted with methanol under ultrasonic assistance,analyzed by GC-MS under full scan and selected ion monitoring (SIM) mode with the external standard method.The result indicated that the calibration curve showed a good linear relationship in range of 0.05 to 10 mg/L with the correlation coefficient of 0.9999.The detection limit for styrene oxide was 0.1 mg/kg.The average recoveries were in the range of 90.5％ to 120.4％ at three spiked levels of 0.5,20 and 100 mg/kg with the relative standard deviations of 0.18％ to 6.95％.With the advantages of simple,quick,low detection limit,good accuracy and high precision,the method could be used for residue surveillance of Styrene oxide in the plastic,electrical and electronic products.