溶剂超声提取-气相色谱法测定荧光笔中11种苯系物  

Determination of 11 benzene series in highlighter by ultrasonic solvent extraction-gas chromatography

作　　者：周梅玲 王志强[1] 姚铭栋 ZHOU Meiling;WANG Zhiqiang;YAO Mingdong(Physical and Chemical Laboratory,Anyang Center for Disease Control and Prevention,Anyang,Henan 455000,China)

机构地区：[1]安阳市疾病预防控制中心理化检验科,河南安阳455000

出　　处：《河南预防医学杂志》2022年第10期753-756,共4页Henan Journal of Preventive Medicine

基　　金：安阳市2020科技发展计划科技攻关项目(2020-126)。

摘　　要：目的 优化气相色谱条件,建立气相色谱法测定荧光笔中11种苯系物(苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯、1,2,4-三甲苯、1,3,5-三甲苯、1,2,3-连三甲苯、异丙苯和苯乙烯)含量的分析方法。方法 样品中加5.0 m L乙酸乙酯,涡旋混匀2 min,超声提取20 min,离心,采用气相色谱仪测定荧光笔中11种苯系物含量。结果 11种苯系物在2.0~20.0 mg/L质量浓度范围内与对应的峰面积呈良好线性关系(r>0.998),检出限(S/N=3)范围为0.04~0.1 mg/kg,加标回收率为83.2%~118.2%,相对标准偏差(RSD)为4.3%~8.9%。结论 该方法前处理操作简单、快速且灵敏度高,适用于荧光笔中苯系物的快速检测。Objective To establish an analytical method for the determination of 11 benzene series(benzene,toluene,ethylbenzene,p-xylene,m-xylene,o-xylene,1,2,4-trimethylbenzene,1,3,5-trimethylbenzene,1,2,3-trimethylbenzene,isopropylbenzene and styrene) in highlighter by optimizing the conditions of gas chromatography.Methods At first,5.0 m L ethyl acetate was added to the sample,followed by vortex mixing for 2 min,ultrasonic extraction for 20 min and then centrifugation.The 11 benzene series in highlighter were determined by gas chromatography.Results The 11 benzene series showed a good linear relationship(r>0.998) between the corresponding peak area and the mass concentration in the range of 2.0-20.0 mg/L,and the detection limit(S/N=3) was 0.04-0.1 mg/kg.The recovery rates ranged from 83.2%-118.2% with the relative standard deviations(RSD)of 4.3%-8.9%.Conclusion The method is simple,rapid and sensitive for the rapid detection of benzene series in highlighter.

关 键 词：气相色谱法 超声提取 荧光笔 苯系物 

分 类 号：O657.71[理学—分析化学] O625.11[理学—化学]