Abstract:
A novel substitutive differential potential stripping analysis for the determination of trace lead via bismuth-film electrode has been studied. Its determination conditions have also been investigated. The results show that Pb in the HAc-NaAc buffer solution can reach the sensitive differential potential stripping analysis peak on bismuth-film electrodes. Combining with microwave enrichment,a detection limit of 0.003 mg/L is obtained. The method has been applied to the determination of trace lead in water samples by standard adding method. It prevents health and environment hazards caused by mercury-film electrode from happening,with satisfactory results.
Key words:
differential potential stripping analysis,
bismuth-film electrodes,
lead,
microwave
摘要：
研究了镀铋膜电极微分电位溶出分析法测定水中铅的方法,考察了该法测定铅的条件。结果表明,在HAc-NaAc介质中铅可在镀铋膜电极上得到灵敏的微分电位溶出峰,结合微波富集方法,检出限达0.003mg/L,利用标准加入法对水样中痕量铅进行测定,避免了镀汞膜电极带来的健康与环境危害,结果较满意。
关键词:
微分电位溶出,
铋膜电极,
铅,
微波
CLC Number:
Yang Min, Ning Ping, Gao Yuntao, Liu Xiaohai, Shi Runju, Xiang Pengzhi, Xu Yineng. Fas t determination of trace lead in water by differential potential s tripping analys is of bismuth-film electrodes combining with microwave enrichment[J]. INDUSTRIAL WATER TREATMENT, 2007, 27(3): 64-66.
杨敏, 宁平, 高云涛, 刘晓海, 施润菊, 项朋志, 胥义能. 微波富集-铋膜电极微分电位溶出法快速测定水中痕量铅[J]. 工业水处理, 2007, 27(3): 64-66.