环境土壤样品中微量钍的测定  

Determination of trace thorium in environmental soil samples

作　　者：李远功[1] 

机构地区：[1]中国核工业集团公司金原铀业公司桂林分公司,广西资源541400

出　　处：《铀矿冶》2010年第3期164-166,共3页Uranium Mining and Metallurgy

摘　　要：研究环境土壤样品中微量钍的测定方法——酸溶法,并与传统的碱熔法作比较,结果表明,采用酸溶法,操作简便、快速。用偶氮胂Ⅲ光度法测定微量钍,方法灵敏度高,分析结果稳定,方法检出限为0.5×10-9,RSD为2.60%。The determination methods of trace thorium in environmental soil samples are studied. The acid dissolution-spectrophotometric method is compared with the alkli fusion-spectrophotometric method. The results show that the acid dissolution-sepctrophotometric method is simple and rapid. The determination of trace thorium by arsenazo Ⅲ spectrophotometric method has the advantages of high sensitivity and stable analysis result. The detection limit reaches 0.5 × 10 ^-9, and RSD is 2.52%.

关 键 词：酸溶法 偶氮胂Ⅲ光度法 微量钍 

分 类 号：O657.32[理学—分析化学]