摘要
本文采用流动注射、离子交换与原子吸收联用技术 ,建立了环境水样中镉离子的在线预浓集火焰原子吸收分析方法 ,讨论了缓冲溶液、洗脱液、样品流速对测定的影响。在 30h- 1的进样频率下 ,灵敏度可提高八倍 ,检出限为 1 .2ng/mL ,相对标准偏差为 2 .8%。在 8h- 1 的进样频率下 ,灵敏度可提高 35倍 ,检出限为 0 .3ng/mL ,相对标准偏差为 4.2。
In this paper,the flow inject technique was applied to develop an efficient on line ion exchange pre concentration system for the AAS determination of Cd in environmental water.The effects of buffers,eluates and samples loading race have been discussed.With a sampling frequency of 30 h -1 ,the concentration enhancement is 8,the detection limits is 1.2 ng/mL and the relation standard deviation is 2.8%. With a sampling frequency of 8 h -1 ,the concentration enhancement is 35,the detection limits is 0.3 ng/mL and the relative standard deviation is 4.3%.
出处
《有色矿冶》
2000年第4期48-51,共4页
Non-Ferrous Mining and Metallurgy
关键词
环境水样
镉
在线预浓集
流动注射
测定
光谱法
environment water
ion exchange
FIA
on line preconcentration
cadmium
FAAS
