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首页> 外文期刊>Журнал аналитической химии >PVC-BASED Cu(II)-SCHIFF BASE COMPLEX MEMBRANE COATED GRAPHITE ELECTRODE FOR THE DETERMINATION OF TRHODIDE ION
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PVC-BASED Cu(II)-SCHIFF BASE COMPLEX MEMBRANE COATED GRAPHITE ELECTRODE FOR THE DETERMINATION OF TRHODIDE ION

机译：PVC基铜（II）-席夫夫基复合膜包覆石墨电极测定痕量离子

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摘要

A triiodide-selective electrode based on copper (II) - Schiffbase complex as a membrane carrier is proposed. The electrode was prepared by incorporating of the carrier into a plasticized polyvinylchloride (PVC) membrane and directly coated on the surface of a graphite electrode. The obtained electrode showed a near Nernstian slope of 57.0 ± 0.4 mV/decade to I3-ions over the activity range of 1.0 × 10~-5-1.0 × 10~-1 M with a limit of detection 4.8 × 10~-6 M. The response time of the electrode was fast (5 s) and the electrode could be used for about 2 months without considerable divergence in response. The potentiometric selectivity coefficients were evaluated and displayed anti-Hofmeister behavior. The electrode was used as indicator electrode in potentiometric titration of triiodide ion and in determination of ascorbic acid in the vitamin C tablets.
机译：提出了一种以铜-席夫碱配合物为膜载体的三碘化物选择性电极。通过将载体掺入增塑的聚氯乙烯（PVC）膜中并直接涂覆在石墨电极的表面上来制备电极。所获得的电极在1.0×10〜-5-1.0×10〜-1 M的活性范围内，对I3-离子的Nernstian斜率接近57.0±0.4 mV /十倍，检测限为4.8×10〜-6 M电极的响应时间很快（5 s），电极可使用约2个月，而响应差异不大。评估电位选择系数并显示出抗霍夫迈斯特行为。该电极在三碘化物离子的电位滴定和维生素C片剂中抗坏血酸的测定中用作指示电极。

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