碳棒电极示波极谱阳极溶出法测定多维元素片中微量铜和锌  

AN ANODIC STRIPPING METHOD FOR THE DETERMINATION OF ZINC AND COPPER BY OSCILLOPOLAROGRAPHY WITH CARBON ELECTRODE

作　　者：田秋霖[1] 张瑞[1] 吴卫兵[1] 李习俊[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430071

出　　处：《理化检验（化学分册）》2002年第4期196-197,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用碳棒电极示波极谱阳极溶出法在同一系统中 ,直接测定多维元素片中的微量铜和锌。在 0 .0 5mol·L- 1KSCN～ 0 .0 1mol·L- 1HCl介质中 ,铜和锌的溶出峰电位分别为 - 0 .2 3V (vs .SCE)和 - 0 .90V。铜和锌分别在 2 0～ 4 0 0 μg·L- 1及 5 0～ 80 0 μg·L- 1范围内呈良好的线性关系 ,平均回收率为 96%和 98%。此法不用汞工作电极 ,无污染 。Copper and zinc in Duowei granules are determined simutaneously by anodic stripping oscillopolarography with carbon electrode. In a medium of 0.05mol·L -1 KSCN～0.01mol·L -1 HCl, the anodic stripping peak of copper is at about -0.23V( vs. SCE) and that of zinc is at about -0.90V. This method is suitable to be used for determination of 20～400μg·L -1 of copper and 50～80μg·L -1 of zinc. The average recovery was 96% for copper and 98% for zinc. Mercury electrode is not used in this method thus leading to no pollution and better repeatability and accuracy.

关 键 词：碳电极 示波极谱 阳极溶出法 测定 多维元素片 微量分析 铜 锌 

分 类 号：R977.5[医药卫生—药品] R917[医药卫生—药学]