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首页> 外文期刊>Electroanalysis >Highly Sensitive and Selective Adsorptive Stripping Voltammetric Method Employing a Lead Film Screen-printed Electrode for Determination of Cobalt as its Nioximate Complex
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Highly Sensitive and Selective Adsorptive Stripping Voltammetric Method Employing a Lead Film Screen-printed Electrode for Determination of Cobalt as its Nioximate Complex

机译：铅薄膜丝网印刷电极用于测定钴作为其肟酸配合物的高灵敏和选择性吸附溶出伏安法

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摘要

A carbon screen-printed electrode modified insitu with lead film (PbF-SPCE) was applied for the adsorptive stripping voltammetric determination of Co(II) in the form of a complex with 1,2-cyclohexanedione dioxime. Lead film was electrochemically deposited in situ on SPCE from a 0.2M ammonia buffer solution (pH 8.7) containing 5.10(-5) M Pb(NO3)(2) and 5.10(-5) M nioxime. Due to the very low LOD (0.003 mu g L-1, i.e., 0.05 nmol L-1 Co(II); t(acc)=120s), the developed procedure could be rated among the most sensitive methods employing SPEs. The Ni(II) signal was significantly lower than the Co(II) one and the separation of Ni(II) and Co(II) peaks was even better at the PbF-SPCE than at the hanging mercury drop electrode.
机译：用铅膜原位修饰的碳丝网印刷电极（PbF-SPCE）用于与1,2-环己二酮二肟配合物形式的Co（II）的吸附溶出伏安法测定。从0.2M含5.10（-5）M Pb（NO3）（2）和5.10（-5）M肟的氨缓冲溶液（pH 8.7）在原位电化学沉积铅膜。由于LOD非常低（0.003μgL-1，即0.05 nmol L-1 Co（II）; t（acc）= 120s），因此可以将开发的方法评为使用SPE的最灵敏方法之一。 Ni（II）信号明显低于Co（II）信号，并且PbF-SPCE的Ni（II）和Co（II）峰的分离甚至比悬挂的汞滴电极更好。

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