氢化物发生原子吸收法测定高纯度碳酸钙中铅  

Determination of lead in high purity calcium carbonate by HG-AAS

作　　者：梁宇宁[1] 黄智[2] 何星存[2] 陈孟林[2] 

机构地区：[1]广西师范大学化学化工学院,桂林541004 [2]广西师范大学环境与资源学院,桂林541004

出　　处：《分析试验室》2007年第7期42-44,共3页Chinese Journal of Analysis Laboratory

基　　金：广西自然科学青年基金(桂科青0542002)项目资助

摘　　要：采用氢化物发生原子吸收光谱法测定了高纯度天然碳酸钙中低浓度铅。结果表明，在还原剂KBH4浓度为15g／L，载液HCl体积分数1％，铅标准曲线线性范围1～20μg/L（r=0．9990），试样溶液加入总盐酸量〈3％的条件下可获得满意结果，RSD小于5．9％，加标回收率在96．0％～104．8％之间。高浓度钙离子对测定无影响。In this paper, the detennination of lead in high purity calcium carbonate by hydride generation-atomic absorption spectrophotometer （HG-AAS） was studied. A good linear relationship between the absorbance and lead concentration ranging from 1 μg/L to 20μg/L （r = 0. 9990） was obtained under the optimum conditions of using 1.5% potassium borohydride solution containing 3 g/L NaOH as reductant and 1% HCl as cartier liquid. RSD was less than 5.9% and recoveries were 96.0% - 104.8%. High concentration of Ca ion did not interfere with the determination of lead.

关 键 词：碳酸钙 铅 氢化物法 

分 类 号：O657.31[理学—分析化学]