共沉淀富集原子吸收法测定水中5种重金属元素

使用有机共沉淀剂DDTC钠盐（铜试剂）。La^3＋作载体离子富集和乙炔火焰原子吸收分光光度法测定监测井水中Cu,Ni,Zn,Pb和Cd,结果表明，该方法精密度较高、结果准确，回收率满足微量元素测定要求,适用于达标排放水，监测井水中常见污染指标元素Cu,Ni，Zn,Pb和Cd的测定。

Atomic Absorption Analysis of Five Trace Heavy Metal Elements in Water with a Pre-Concentration Method by Co-Precipitation

An organic co-precipitator sodium diethyldithiocarbamate ((C_2H_5)_2NCS_2Na) and carrier of La~(3+)for ionic enrichment were used to determine trace metals of Cu, Ni, Zn, Pb and Cd in monitoring well water by atomic absorption spectrophotometry with air and acetylene flame. The experimentation showed its higher precision and satisfaction of recovery rate for determination of trace elements, and applicability for monitoring the compliance of the effluent and common pollutants in well water such as Cu, Ni, Zn, Pb and Cd.