| 金在苯基硫脲介质中的单扫示波极谱研究 |
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| 引用本文： | 曹光周,赵藻藩. 金在苯基硫脲介质中的单扫示波极谱研究[J]. 高等学校化学学报, 1985, 6(3): 211 |
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| 作者姓名： | 曹光周 赵藻藩 |
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| 作者单位： | 武汉大学化学系 |
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| 摘 要： | 本文报导金在苯基硫脲(PT)介质中的单扫示波极谱波的形成条件和反应机理.该法测金的线性范围为5×10-8-3×10-6M,选择性和稳定性均较好,经用活性炭分离富集,比较成功地应用于矿石分析.
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| 收稿时间： | 1983-10-04 |
Single Sweep Polarographic Study of Gold in the Phenylthiourea Medium |
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| Cao Guangzhou,Zhao Zaofan. Single Sweep Polarographic Study of Gold in the Phenylthiourea Medium[J]. Chemical Research In Chinese Universities, 1985, 6(3): 211 |
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| Authors: | Cao Guangzhou Zhao Zaofan |
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| Affiliation: | Department of Chemistry, Wuhan University, Wuhan |
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| Abstract: | In acidic phenylthlourea medium (pH2.2), by using single sweep polarography, gold can produce a sensitive cathodic polarographic wave at - 0.3V (vs. SCE). There is a linear dependence of wave height on gold concentration over a range of 5 ×10-8-3×10-6M. The method is good in selectivity and stability. After seperating and concentrating trace amounts of gold by the active carbon adsorption method, the method has been successfully applied to the determination of trace gold in ores.The mechanism of the polarographic wave was studied by a number of techniques. It was shown that phenylthiourea (PT) could be oxidized by Au(Ⅲ) to form sym-diphenyldithioformamidine (DF) which was strongly adsorbed by DME, then DFwas reduced at the electrode and produced a sensitive adsorptive polarographic wave. The mechanism may be represented as follows. |
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