流动注射在线分离富集火焰原子吸收法测定环境样品中的铅和镉  

Determination of Lead and Cadmium in Environmental Samples by Flow Injection-Flame Atomic Absorption Spectrometry with On-line Separation and Enrichment

作　　者：王爱霞[1] 张宏[1] 刘琳琳[1] 

机构地区：[1]东北师范大学分析测试中心,长春130024

出　　处：《分析化学》2001年第11期1284-1287,共4页Chinese Journal of Analytical Chemistry

摘　　要：使用PT C1 8色谱预处理柱 ,以二乙基二硫代氨基甲酸钠 (DDTC)和吡咯啶二硫代氨基甲酸铵(APDC)混合物为螯合剂 ,甲醇为洗脱剂 ,采用流动注射在线分离富集与原子吸收联用技术 ,对铅和镉的测定进行了研究。 1min富集 (4.2mL) ,检出限 :Pb为 6 .90 μg L ;Cd为 0 .45 μg L ,相对标准偏差 :Pb为2 80 % ;Cd为 2 .47%Lead and cadmium were determined by flame atomic absorption spectrometry with on-line PT-C-18 precolumn-flow injection separation and enrichment technique. In this system, ammonium pyrrolidinedithiocarbamat, and sodium diethyldithiocarbamate were used as a chelating agent, and methanol was used as an eluant. Detection limit per minute enrichment (4.2 mL) for Pb and Cd was 6.90 mug/L, and 0.45 mug/L respectively, and the relative standard deviation for Pb and Cd was 2.8% and 2.5% respectively.

关 键 词：流动注射 火焰原子吸收法 色谱预处理柱 环境样品 测定 分离 富集 铅镉 

分 类 号：O657.3[理学—分析化学]