功能化温控离子液体萃取-火焰原子吸收光谱法分析痕量铅  

Separation/analysis of trace lead by task-specific temperature-assisted ionic liquid-flame atomic absorption spectrophotometry

作　　者：宋迪燊 何海艳[1] 何志坚[1] 崔书亚[1] 杜军良[1] 

机构地区：[1]绵阳师范学院化学与化学工程学院,绵阳621000

出　　处：《分析试验室》2015年第8期944-946,共3页Chinese Journal of Analysis Laboratory

基　　金：四川省教育厅自然科学基金项目(14ZB0267);绵阳师范学院校级科研基金自然科学项目(2014A12);2015年度绵阳师范学院学生科研项目(XSKY15005)资助

摘　　要：建立了温敏性离子液体萃取结合火焰原子吸收法测定痕量Pb的分析方法。考察了对萃取效率的影响因素,以温敏性离子液体为N-正丁烷基苯并噻唑六氟磷酸盐离子液体为萃取剂,溶液p H为5.99,离子液体的质量浓度为80 mg/m L,萃取时间为30 min,冰浴时间为30 min,离心时间为15 min。方法的线性方程为A=0.0223ρ-0.0001,相关系数为0.9995,线性范围为0.08~1.0μg/m L。检出限为25.8 ng/m L,加标回收率为94.4%~102.4%。A simple,sensitive and accurate method was developed for the determination of lead ion by taskspecific temperature-assisted ionic liquid with flame atomic absorption spectrometry. The main factors affecting the extraction efficiency,such as p H value,amount of ionic liquid and hydrochloric acid ultrasonic extraction time,were studied. The optimal conditions were as follows： p H value was set at 5. 99,the concentration of ionic liquid was 80 mg/m L,the extraction time was 30 min,the ice bath time is 30 min,and the centrifugation time was 15 min. The linear equation method was： A = 0. 0223ρ- 0. 0001,with correlation coefficient of 0. 9995 in the linear range of 0. 08 ~ 1. 0 μg/m L. The recoveries for the method were between 94. 4% ~ 102. 4%,and the detection limit was 0. 0258 μg/m L.

关 键 词：温控离子液体 铅 萃取 火焰原子吸收光谱法 

分 类 号：X132[环境科学与工程—环境科学] O657.3[理学—分析化学]