摘要
5 -磺基 -8-羟基喹啉用作微柱流动注射在线分离、富集和电感耦合等离子体质谱分析流程中的螯合剂 ,与铅反应生成铅螯合物被硅酸镁吸附剂吸附 ,实现痕量铅的分离、富集。对联用系统的参数如螯合剂用量、淋洗条件、洗脱条件和进样量等进行最优化 ,测定标准水样和加标海水的铅回收率分别为 1 0 1 %和 97.9% ,相对标准偏差为± 0 .98% ,检测限为 0 .2 0 4 μg/ L。可应用于生物。
The chelating reaction of lead with 8-hydroquinoline-5-sulfonic acid (8-HQS) is used for measuring trace lead in seawater. The detection limits of this method estimated with 3σ of the procedure blank is 0.204 μg/L. The recovery of spiked Pb standard in seawater is 97.9%. The relative standard deviation(s r) is ±0.98%. The certification reference water (GBW 08607) is used to assess the accuracy of this method. The result is in good agreement with the certified value and the recovery is 101%. The parameters of the hyphenated technique, such as the concentration of 8-HQS, sample loading time and speed, washing time, eluent acid concentration and instrumental parameters of MFI-ICP-MS are optimized. This method can be recommended to determine the trace lead concentration in high salt matrix of samples.
出处
《质谱学报》
EI
CAS
CSCD
2003年第2期337-342,共6页
Journal of Chinese Mass Spectrometry Society
基金
福建省中药标准化项目 ( 2 0 0 0 F0 0 1)
建泽泻 GAP重大项目 ( 2 0 0 2 Y0 2 4)
科技部中药重中之重项目 ( 99- 92 9- 0 2 - 13 )
关键词
同位素稀释
电感耦合等离子体质谱
测定
海水
痕量分析
铅
微柱流动注射
在线分离
富集
mass spectrometry
determination of trace lead
inductively coupled plasma mass spectrometry (ICP-MS)
seawater
micro-flow injection (MFI)
isotope dilution (ID)
