| 引用本文： |
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黄富嵘,蔡卓,梁稳,钟伟明,李进拖.催化极谱法测定土壤中的痕量镉[J].广西科学院学报,2006,22(S1):446-448. [点击复制]
- HUANG Fu-rong,CAI Zhuo,LIANG Wen,ZHONG Wei-ming,LI Jin-tuo.Polarographic Determination of Cadmium in Soil[J].Journal of Guangxi Academy of Sciences,2006,22(S1):446-448. [点击复制]
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| 摘要: |
| 采用单扫描极谱法测定土壤中镉含量,确立了1%碘化钾-1.5%酒石酸钾钠-2%三乙醇胺-0.6%盐酸-9%磷酸测定体系。在此测定体系中,镉在滴汞电极上于-0.71V(相对饱和甘汞电极)处产生一灵敏催化极谱波,镉浓度在0.2ng/ml~1μg/ml范围内与极谱峰电流有良好线性关系,检出限为0.1ng/ml。该方法用于土壤样品测定的RSD为0.6%~9.5%,加标回收率为90%~110%。该方法操作简便,用于土壤样品测定的结果满意。 |
| 关键词: 镉 土壤 极谱法 |
| DOI： |
| 投稿时间：2006-07-15 |
| 基金项目: |
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| Polarographic Determination of Cadmium in Soil |
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HUANG Fu-rong1, CAI Zhuo1, LIANG Wen2, ZHONG Wei-ming3, LI Jin-tuo1
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| (1.College of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004, China;2.Guangxi Sci-tech Instrument & Equipment Co., Ltd., Nanning, Guangxi, 530022, China;3.Nanning Quality Technology Supervision Bureau, Nanning, Guangxi, 530022, China) |
| Abstract: |
| A new method for the determination of trace cadmium in soil using polarography is described.The supporting electrolyte solution used in this measurement is established as 1%KI-1.5%KNaC4H4O6-2%N(CH2CH2OH) 3-0.6%HCl-9%H3PO4.The peak potential of cadmium is -0.71V(vs.SCE).The peak height is linear with cadmium concentration in the range of 0.2ng/ml~1μg/ml.The detection limit is 0.1 ng/ml,the RSD for determining cadmium in soil is in the range of 0.6%~9.5%,and the recovery is 90%~110%.This method is rapid and simple,and has been used to determine trace cadmium in soil sample with satisfactory results. |
| Key words: cadmium soil digestion polarography |
