摘要
本文将NaDDC—泡塑用于分离富集天然水中的痕量镉。对富集和洗脱条件、共存离子的影响及干扰的消除作了详细研究。试验结果表明,在pH8—10的氨性环境,以柠檬酸和酒石酸作掩蔽剂,NaDDC—泡塑可定量富集天然水中的痕量镉。每克NaDDC—泡塑对镉的饱和富集容量高达45mg。富集于NaDDC—泡塑上的镉用2％磺基水杨酸在沸水浴中定量洗脱后,可直接用火焰AAS法测定。
In this paper,NaDDC(sodium diethydithiocarbamate) loaded polyurethane foam is used to separate and concentrate trace cadmium in natural water. Preconcentration and elution conditions for trace cadmium,the influence of ions present with cadmium and elimination of the interference with determination of trace cadmium by some foreign ions are studied in detail. It is shown by experiments that trace cadmium in natural water can be quantitatively concentrated in an ammoniacal ms masking agent. The saturated extraction capacity of one gram of NaDDC-Polyurethane foam for cadmium is 45 mg. Cadmium concentrated on the NaDDC-polyurethane foam can be eluted by 2% sulfosalicylic acid in a boiling water-bath and them directly determined by flame AAS.
出处
《矿物岩石》
CAS
CSCD
1990年第4期109-112,共4页
Mineralogy and Petrology
