研究用细菌修饰的碳糊电极对金离子的响应特性,并应用该电极检测水溶液中的金离子,金离子浓度在10~100μg/mL.呈线性关系,重现性为3.4%,检测限达1ng/mL.电极具有制备简单,灵敏度高等优点.文中还讨论了金离子在还原菌修饰的碳糊电极上的还原机理.
An electrochemically pretreated carbon paste electrode modified with bacteria has been studied and used for determination of trace amounts of gold(Ⅲ). A detection limit of 1 ng/mL was obtained by applying cathodic stripping valtammetry. There is a linear relationship between the concentration and peak height in the range of 10~100 μg/mL. The ralative standard deviation of the response to 84.7 μg/mL Au(Ⅲ) is 3.43%.
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