摘要
石墨炉原子吸收法测定银镉铅灵敏度很高(10^(-12)—10^(-13)g),但基体影响很大。地质样品中银、镉、铅的石墨炉原子吸收法测定多采用有机溶剂萃取、分离大量杂质后测定。基体改进剂用于石墨炉原子吸收技术,近年来日渐受到重视。N.Bloon用磷酸氢二铵作基体改进剂,直接测定了海洋沉积物中痕量银;金风鸣等以磷酸作抑制剂,直接测定了土壤中镉、铅;分析化探样品中银时,林绍军用铱作基体改进剂;金龙珠等用钯作基体改进剂对泥样和煤灰中的铅进行了测定;
A rapid and simple method for the determination of trace amounts silver, cadmium and lead by L'vov platform graphite furnace AAS has been developed. Ammonium monohydric phosphate was used as the matric modifier. The absolute sensitivity of silver was 1.6pg, cadmium was 0.5pg and lead was 4.2pg. The RSD was Ag 5.37%, Cd 4.5% and Pb 4.2% (n=10) for the sample containg Ag 0.063ppm, Cd 0.065ppm and Pb7.8 ppm.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1990年第5期66-69,65,共5页
Spectroscopy and Spectral Analysis
