SPE/GC/ICP-MS联用技术测定水中四乙基铅  

Determination of Tetraethyl Lead in Water by SPE/GC/ICP-MS

作　　者：辛晓东 孙韶华 刘红 李昂臻[2] 赵清华 张承晓 贾瑞宝 XIN Xiao-dong;SUN Shao-hua;LIU Hong;LI Ang-zhen;ZHAO Qing-hua;ZHANG Cheng-xiao;JIA Rui-bao(Urban Water Monitoring Centre of Shandong Province,Jinan 250101,China;China Academy of Urban Planning&Design.Beijing 100037,China)

机构地区：[1]山东省城市供排水水质监测中心,山东济南250101 [2]中国城市规划设计研究院,北京100037

出　　处：《中国给水排水》2022年第3期126-130,共5页China Water & Wastewater

基　　金：国家自然科学基金青年基金资助项目(51808512);山东省重点研发计划项目(2020CXGC011406);济南市水务科技项目(JNSWKJ202108);山东省中央引导地方科技发展资金资助项目(YDZX20203700001642);山东省自然科学基金青年基金资助项目(ZR2019QEE022);山东省泰山学者建设工程专项(ts201712084);国家水体污染控制与治理科技重大专项(2018ZX07502001-007)。

摘　　要：提出了气相色谱与电感耦合等离子体质谱联用测定水中四乙基铅浓度的方法。水样通过固相萃取富集、气相色谱分离后,采用电感耦合等离子体质谱测定四乙基铅浓度。四乙基铅在0.05~5.00μg/L范围内与响应信号呈良好的线性关系,若取1.0 L水样,浓缩至5.0 mL,浓缩倍数为200倍,方法的检出限为5 ng/L。在优化建立的分析条件下,开展了5×10^(-5)mg/L和5×10^(-4)mg/L两种浓度的加标回收方法评估研究。结果表明,地表水、生活饮用水等水样的加标回收率在80.7%~108%之间,相对标准偏差为3.9%~6.2%(n=6)。该方法操作简便、灵敏度高,可满足城市水系统中四乙基铅痕量检测的要求。A method for determination of tetraethyl lead concentration in water by gas chromatography and inductively coupled plasma mass spectrometry (GC/ICP-MS) was proposed.The water samples were enriched by solid phase extraction and separated by GC,and the concentration of tetraethyl lead was determined by ICP-MS.Tetraethyl lead showed a good linear relationship with the response signal in the range of 0.05-5.00μg/L.If 1.0 L water sample was concentrated to 5.0 mL (the concentration time was 200),the detection limit of the method was 5 ng/L.Under the optimized analytical conditions,the standard recoveries of two methods with tetraethyl lead concentrations of 5×10^(-5)mg/L and5×10^(-4)mg/L were evaluated.The recoveries of surface water and drinking water ranged from 80.7%to108%,and the relative standard deviations were from 3.9%to 6.2%(n=6).The method is simple and sensitive,and can meet the requirements of trace detection of tetraethyl lead in urban water system.

关 键 词：城市水系统 四乙基铅 固相萃取 气相色谱 电感耦合等离子体质谱 

分 类 号：TU991[建筑科学—市政工程]