| 锗钼杂多酸单扫描极谱法测定枸杞中的微量锗 |
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| 引用本文： | 王长发,马万山,陈勇,蒋勉.锗钼杂多酸单扫描极谱法测定枸杞中的微量锗[J].分析科学学报,2000,16(6):474-477. |
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| 作者姓名： | 王长发 马万山 陈勇 蒋勉 |
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| 作者单位： | 武汉大学化学系，武汉，430072 |
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| 摘 要： | 在ＰＨ８．９的氨性缓冲溶液中，锗钼杂多在示波极谱上，于－１．０５Ｖ（ｖｓ．ＳＣＥ）产生灵敏的吸附波。导数波高与锗 度在６．９＊１０＾－８－５．５＊１０＾－５ｍｏＬ范围内有好的线性关系，检出限为３．５＊１０＾－８ｍｏｌ／Ｌ。用本法测定了中药枸杞中的锗，得到满意的结果。
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| 关 键 词： | 锗 枸杞 单扫描极谱法 中药 锗钼杂多酸 测定 |
| 文章编号： | 1006-6144(2000)06-0474-04 |
| 修稿时间： | 2000年4月25日 |
Single Sweep Polarographic Determination of Germanium in Medlar Using Its Heteropoly Acid Complex |
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| WANG Chang-fa,MA Wan-shan,CHEN Yong,JIANG Mian.Single Sweep Polarographic Determination of Germanium in Medlar Using Its Heteropoly Acid Complex[J].Journal of Analytical Science,2000,16(6):474-477. |
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| Authors: | WANG Chang-fa MA Wan-shan CHEN Yong JIANG Mian |
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| Abstract: | In about 0.15 mol/L HCl solution containing ascorbic a cid, GeO2-3 can rapidly react with molybdate. The reaction product can be reduced with a sensitive wave at the Ep of about -1.05 V(vs.SCE) in NH 3-NH4Cl buffer solution(pH=8.9). The second derivative peak height is propo rtional to the Ge concentration in the range of 6.9×10-8～5.5×10-5 mol/L with the detection limit of 3.5×10-8 mol/L. The method is applied to the determination of germanium in medlar with satisfactory results. The behav ior of polarographic wave has also been studied. |
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| Keywords: | Germanium Germanomolybdate Medlar Polarography |
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