顶空-气相色谱法与顶空-气质联用法测定饮用水中苯系物的方法建立及比较
The Establishment and Comparison of HS-GC and HS-GC-MS Methods for The Determination of Benzenes in Drinking Water
庄景新 1吴云钊 1乔庆东 1曹民 1姜永丽 1朱雅旭1
作者信息
- 1. 北京市昌平区疾病预防控制中心理化检验科,北京 102200
- 折叠
摘要
目的:建立顶空-气相色谱法及顶空-气质联用法测定饮用水中常用7种苯系物(苯、甲苯、乙苯、间二甲苯、对二甲苯、邻二甲苯和苯乙烯),探讨两种测定方法的一致性.方法:优化了顶空、色谱、质谱等测定条件,对两种方法的检出限、精密度、准确度进行比较.结果:两种方法的回收率均在 90.4%～100.2%,相对标准偏差均在 1.1%～4.3%,顶空-气相色谱法的最低检出浓度分别为 0.03～0.08 μg·L-1,顶空-气质联用法的最低检出浓度分别为 0.002～0.005 μg·L-1,测定结果无显著性差异.结论:两种方法操作简单、快速,准确度和灵敏度高,均适用于饮用水中苯系物的日常检测.顶空-气质联用法的灵敏性更高,适用于痕量、基质复杂样品的测定;顶空-气相色谱法适用于高浓度样品的测定.
Abstract
Objective:To establish headspace gas chromatography and headspace GC/MS methods for the determination of seven benzene homologues(benzene,toluene,ethylbenzene,m-xylene,p-xylene,o-xylene and styrene)in drinking water,and to discuss the consistency of the two methods.Method:The conditions of headspace,chromatography and mass spectrometry were optimized,and the detection limits,precision and accuracy of the two methods were compared.Result:The recoveries of the two methods were 90.4%～100.2%,the relative standard deviations were 1.1%～4.3%,and the lowest detectable concentrations of headspace gas chromatography were 0.03～0.08 μg·L-1,the lowest detectable concentration of headspace GC-MS was 0.002～0.005 μg·L-1,there is no significant difference in the determination results.Conclusion:The two methods are simple,rapid,accurate and sensitive,and are suitable for the daily detection of benzene homologues in drinking water.Headspace GC/MS method is more sensitive and suitable for the determination of trace and matrix complex samples;Headspace gas chromatography is suitable for the determination of high concentration samples.
关键词
饮用水/苯系物/顶空/气相色谱法/气质联用法Key words
drinking water/benzenes/headspace/GC/GC-MS引用本文复制引用
出版年
2024
NETL
NSTL
万方数据