硝酸一次消解同时测定土壤中Cd、As、Hg的方法研究  

Determination of Cadmium,Arsenic and Mercury in Soil with Nitric Acid Digestion Technique

作　　者：谢锋[1] 何锦林[2] 谭红[2] 邓秋静[1] 宋春然[1] 陈安宁[1] 吉玉碧[1] 

机构地区：[1]贵州大学,贵州贵阳550003 [2]贵州省理化测试分析研究中心,贵州贵阳550002

出　　处：《土壤通报》2006年第2期340-342,共3页Chinese Journal of Soil Science

基　　金：贵州省省长基金;黔科教办(2003)04号

摘　　要：硝酸在水浴中一次性消解土壤样品，用石墨炉原子吸收测定镉、原子荧光光谱法同时测定砷和汞。其检出限镉为0．053ng ml^-1、砷为0．011mg ml^-1、汞为0．008ng ml^-1，线性范围镉为0—4ng ml^-1、砷为0—40ng ml^-1、汞为0-2ng ml^-1。回收率在93．0—104．0％。本方法简便了消煮过程，一次消解能同时测定土壤中的多种重金属。A technique was established to measure Cd, As and Hg in soil. After ectraction with nitric acid in boiling water,Cd was analysed by graphite furnace atomic absorption spectrometry, while As and Hg by atomic fluorescence spectometry. The detection limit is 0. 053ng ml^-1 for Cd,0. 011 ng ml^-1 for As and 0. 008 ng ml^-1 for Hg. The calibration lines are linear in the range of 0 -4 ng ml^-1 for Cd,0 -40 ng ml^-1 for As and 0-2 ng ml^-1 for Hg,and the recoveries of these elements range from 93.0% to 104.0%. The method is simple, rapid and low on the detection limit.

关 键 词：消化 石墨炉原子吸收 原子荧光 重金属 

分 类 号：O655.29[理学—分析化学]