共振光散射比浊法测定环境水样中Pb(Ⅱ)  

Determination of Pb^(2+) by resonance light-scattering turbidimetry method

作　　者：李小燕[1] 李树伟[1] 王小红[1] 何艺[1] 潘建章[1] 曾铭[1] 

机构地区：[1]四川师范大学化学学院,成都610066

出　　处：《西南民族大学学报（自然科学版）》2005年第2期192-194,共3页Journal of Southwest Minzu University(Natural Science Edition)

摘　　要：基于铅与重铬酸钾反应产生沉淀拟定了一种测定铅的共振光散射比浊法.通过实验确定了适宜的反应条件.实 验表明,在λ=497 nm处,该体系有较大且较稳定的共振光散射强度,并且共振光散射强度与铅浓度成线性关系,线 性范围为0.1-1.0μg/ml,检测限为0.0573μg/mL.该方法快速,灵敏,简便.将该方法用于实际含铅水样中的铅的测定 并与原子吸收光谱法比较,结果较为满意.A method of enhanced effect on Pb2+ -potassium dichromate by resonance light-scattering turbidimetry is studied in this paper. The optimum reaction conditions and the quantitative relationships of the intensities of RLST to the concentration of Pb2+ are established. The RLS intensity at 497nm is maximum and proportional to the concentration of Pb2+. The method is simple and rapid with a detection limit of 0.0573μg/mL and a linear range of 0.1-1.0μg/mL. It is applied to the determination of Pb2+ in sample water with satisfactory results.

关 键 词：铅 重铬酸钾 共振光散射比浊 

分 类 号：O657.3[理学—分析化学]