硝酸、硫化钠溶液浸取冷原子荧光法选择性测定土壤及河流沉积物中硫化汞

Selective Determination of Mercury Sulphide in Soils and River Sediments by Cold Atomic Fluorescence Spectrometry With Extraction of Nitric Acid and Saturated Sodium Sulphide

本文研究了饱和硫化钠溶液对土壤样品中硫化汞的浸取效率(其加标回收率达100%),以及用硝酸和硫化钠溶液对样品中汞的选择性浸取并研究了土壤中硫化汞垂直分布。提出了利用硝酸、饱和硫化钠溶液浸取,由冷原子荧光法选择性测定土壤及河流沉积物中硫化汞的新方法。用该方法对同一样品进行8次测定,其相对标准偏差为7.1%。

The extraction of mercury sulphide with saturated sodium sulphide is studied, the recovery is 100%.Nitric acid and saturated sodium sulphide extract mercury from sample,the distribution of mercury sulphide in the same site but at different depths is also studied,This paper describes a method for selective determination of mercury sulphide in soils and river sediments by cold atomic fluorescence spectrometry with saturated sodium sulphide extraction.The same samples were determined eight times by this method and the relative standard deviation is 7.1%