原子荧光法测定土壤中痕量砷和汞

Atomic fluorescence method for determination of trace arsenic and mercury in soil

本文建立微波消解法处理土壤样品,PSA固相萃取柱去除消解液中金属元素,原子荧光法同时测定土壤中砷和汞的方法。本方法在0.50~20.0μg·L^(-1)范围内线性良好,测得土壤标准样品均在定值范围内,砷和汞测定结果的相对标准偏差均小于5%,实际土壤样品砷和汞的加标回收率分别为94.0%~104.9%和92.3%~97.9%。本方法操作简便、快速、准确度高、检出限低,完全适用于土壤环境样品中砷和汞的检测。

This paper establish a microwave digestion method and treatment of soil samples, PSA solid-phase extraction column to remove metal elements in digestion solution, the atomic fluorescence method was developed for the determination of arsenic and mercury in soil at the same time. The method in 0.50~20.0μg·L^-1 band, the linear measurement standard soil samples in the range of the fixed value of arsenic and mercury determination re- sults of relative standard deviation less than 5%, the actual standard addition recovery rate of arsenic and mercury soil samples were 94.0% -104.9% and 92.3% ~104.9% respectively. This method is simple, rapid, high accuracy and low detection limit, fully applicable to the analysis of arsenic and mercury in soil environmental samples.