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首页> 外文期刊>Electroanalysis >Catalytic Adsorptive Stripping Chronopotentiometry of Co(II)-DMG-Bromate System at an In Situ Plated Lead Film Electrode
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Catalytic Adsorptive Stripping Chronopotentiometry of Co(II)-DMG-Bromate System at an In Situ Plated Lead Film Electrode

机译:Co(II)-DMG-溴酸盐体系在原位镀铅膜电极上的催化吸附溶出计时电位法

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摘要

A novel catalytic adsorptive stripping chronopotentiometric (CC-CAdSCP) procedure for the determination of Co(II) traces was developed using a lead film electrode (PbFE). The PbFE was generated in situ on a glassy carbon support from a 0.1 M ammonia buffer containing 1×10~(-5) M Pb(II), 6.5×10~(-5) M DMG and the target metals. An addition of 0.2 M NaBrO_3 to the solution yielded an 11-fold catalytic enhancement of chronopotentiometric response of the Co(II)-DMG complex. The CC-CAdSCP curves were well-developed, sharp and reproducible (RSD 5.0% for 5×10~(-9) M Co(II)). The limit of detection for Co(II) for 210 s of accumulation time was 4×10~(-10) M (0.024 mg L~(-1)). In addition, the elaborated method allowed the simultaneous quantification of Co(II) and Ni(II) simultaneously.
机译:利用铅膜电极(PbFE)开发了一种新型的催化吸附溶出计时电位法(CC-CAdSCP),用于测定痕量Co(II)。 PbFE在玻璃碳载体上由含1×10〜(-5)M Pb(II),6.5×10〜(-5)M DMG和目标金属的0.1 M氨缓冲液原位生成。向溶液中添加0.2 M NaBrO_3可使Co(II)-DMG络合物的计时电位响应提高11倍。 CC-CAdSCP曲线发达,清晰且可重现(5×10〜(-9)M Co(II)的RSD为5.0%)。 Co(II)在210 s的累积时间内的检出限为4×10〜(-10)M(0.024 mg L〜(-1))。此外,精细的方法允许同时定量Co(II)和Ni(II)。

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