浊点萃取-火焰原子吸收光谱法测定水样中痕量铅的研究  

Determination of trace amount of lead in water samples by flame atomic absorption spectrometry after cloud point extraction

作　　者：方克鸣[1] 吴兰菊[1] 吴小华[1] 陈建荣[1] 

机构地区：[1]浙江师范大学化学与生命科学学院,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2006年第3期297-301,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江省自然科学基金资助项目(202127)

摘　　要：提出了浊点萃取-火焰原子吸收光谱法测定痕量铅的新方法,并详细探讨了溶液pH值、试剂浓度等实验条件对浊点萃取及测定灵敏度的影响.在最佳条件下,富集50 mL样品溶液,用火焰原子吸收光谱法测定,铅的检测限为0.82μg/L,铅的富集倍数为66倍.该方法可用于自来水、井水及河水中痕量铅的测定.A new method for the determination of trace amount of lead in water by flame atomic absorption spectrometry after cloud point extraction was proposed. The effect of experimental conditions such as pH and concentration of reagents on cloud point extraction and determination sensitivity was discussed. The chemical variables affecting the separation phase and extraction recovery were optimized. Under the optimum conditions, pre-concentration of only 50 mL of sample in the presence of 0.5 g/L Triton X-114 permitted the detection of 0.82μg/L （3σ） for lead. The enhancement factor was 66 for lead. The proposed method has been applied to the determination of lead in water samples with satisfactory recoveries.

关 键 词：铅 浊点萃取法 火焰原子吸收光谱法 水样 

分 类 号：O657.31[理学—分析化学]