摘要
天然水体中汞的含量仅为ng／L级,不仅难以测出,而且在测定过程中极易受到干扰;利用两次金汞齐的预富集方法与原子荧光法结合的技术,作者建立了天然水体超痕量不同形态汞的准确分析方法;该方法的检出限达到了0.02ng／L,实验平均回收率为101%;该方法也适用于其它低汞含量水样(包括稀释后的污水及化工废水)中汞的形态分析。
Total mercury concentrations in natural waters are only in the range of ng/L,and interference and contamination make the direct determination of mercury in water samples difficult.In this paper,a method of two-stage amalgamation pre_concentration coupled with atomic fluorescence spectrometry(AFS)is proposed for the determination of ultra trace levels of mercury species in natural waters.Its detection limit is0.02ng/L,and its average recovery rate is101%.This method is also applicable to the speciation analysis of mercury in other types of water samples.
出处
《分析测试学报》
CAS
CSCD
北大核心
2003年第5期10-13,共4页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目(40173037)
中国科学院海外杰出人才计划资助项目
关键词
天然水体
痕量元素
汞
形态分析
环境污染
Natural waters
Ultra trace level analysis
Mercury
Speciation analysis
