GC×GC-TOFMS法在织物多氯联苯筛查中的应用  

Application of GC×GC-TOFMS in Search of PCBs in Textiles

作　　者：方科益[1] 沈燕 顾佳丽 钟莺莺[1] 

机构地区：[1]宁波出入境检验检疫局检验检疫技术中心,浙江宁波315012 [2]象山出入境检验检疫局,浙江象山315700 [3]宁波中盛产品检测公司,浙江宁波315012

出　　处：《针织工业》2017年第10期62-65,共4页Knitting Industries

基　　金：国家质检总局科技计划项目(2016IK170);宁波市创新团队(2015C110018);宁波出入境检验检疫局科技项目(甬K07-2016)

摘　　要：采用全二维气相色谱-飞行时间质谱(GC×GC-TOFMS),建立了纺织品中多氯联苯类物质(PCBs)的定性筛查方法,并考察定量方法性能。采用正己烷作为提取剂,超声波提取,浓硫酸磺化法净化,全二维气相色谱-飞行时间质谱仪进行检测,并与一维气相体系比较。结果表明,定量方法考察显示,其定量限为100μg/kg,线性相关系数均大于0.990 0,三水平方法回收率为77.5%~89.3%,相对标准偏差在5.7%~15.0%。The qualitative screening method of PCBs in textiles was established by using comprehensive two di- mensional gas chromatography-time of flight mass spectrometry （GC×GC-TOFMS）, and the performance of quanti- tative methods was investigated. Samples were extracted with n-hexane by ultrasonic, cleaned-up with concentrated H2SO4, analyzed by GC×GC-TOFMS and compared with one-dimensional gas phase system （GC-ECD）. The results show that GC×GC-TOFMS has significant advantages in the separation and qualitative analysis of isomers of PCBs, with the limit of quantification （LOQ） of 100 μg/kg, and the linear correlation coefficient of 4 selected PCBs was above 0.99, the recovery is in the range of 77.5%-89.3% and the relative standard deviation is 5.7%-15.0% which is higher than that of traditional method.

关 键 词：纺织品 多氯联苯 全二维气相色谱-飞行时间质谱法 定性筛查 回收率 相对标准偏差 

分 类 号：TS187[轻工技术与工程—纺织材料与纺织品设计]