| 引用本文： |
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宋桂金,魏小平.电位溶出法测定污泥中的痕量铅和镉[J].广西科学,2003,10(2):107-109,112. [点击复制]
- Song Guijin,Wei Xiaoping.Determination of Pb2+ and Cd2+ in Sludge Samples by Potential Stripping Analysis[J].Guangxi Sciences,2003,10(2):107-109,112. [点击复制]
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| 摘要: |
| 在HAc-NaAc缓冲溶液(pH值5.0)中,铅、镉离子分别于-0.47V(vs.SCE)和-0.67V(vs.SCE)可得到灵敏的电位溶出峰,峰高与溶液中铅、镉离子的浓度(0~20μg/L)呈线性关系,线性回归方程分别为dt/dE=2.4823CPb2+-0.0937(r=0.9992);dt/dE=1.872CCd2++0.1299(r=0.9990)。检出限分别为0.08μg/L和0.06μg/L。该方法用于测定实际污泥样品中痕量铅和镉的含量,结果与石墨炉原子吸收法测定的结果基本吻合。利用电位溶出法测定污泥中痕量重金属,具有灵敏度高,准确度好,仪器筒单,操作简便等特点。 |
| 关键词: 污泥 铅 镉 电位溶出法 |
| DOI： |
| 投稿时间：2002-10-14修订日期：2002-12-09 |
| 基金项目: |
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| Determination of Pb2+ and Cd2+ in Sludge Samples by Potential Stripping Analysis |
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Song Guijin, Wei Xiaoping
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| (Guangxi Monitoring Center of Geological Environment, Huancheng Nanyilu, Guilin, Guangxi, 541004, China) |
| Abstract: |
| A sensitive method for the determination of trace amount of lead and cadmium in sludge by potential stripping analysis (PSA) using mercury film electrodes is proposed. In HAc NaAc buffer solutions,Pb2+ and Cd2+ exhibit stripping peaks[dt/dE-f(E)] at -0.47V and -0.67V (vs SCE) respectively. There are linearship between the peak heights and the concentration of Pb2+ and Cd2+. The regress equations of linearity that dt/dE=2.4823 CPb2+-0.0937(r=0.9992);dt/dE=1.872 CCd2++ 0.1299(r=0.9990) are obtained. The detect limits of Pb2+ and Cd2+ are 0.08 and 0.06 μg/L respectively. The method is sensitive,selective,rapid and simple that applied to determination of trace lead and cadmium in sludge samples with satisfactory results. |
| Key words: sludge plumbum cadmium potential stripping analysis |
