Department of Chemistry, Faculty of Science, University of Razi, Kermanshah, Iran.
Talanta. 2003 Jul 4;60(4):707-13. doi: 10.1016/S0039-9140(03)00130-9.
A poly(vinyl chloride) membrane based on glyoxal bis(2-hydroxyanil) as membrane carrier was prepared and investigated as a Cr(III)-selective electrode. The electrode has a linear dynamic range of 3.0x10(-6)-1.0x10(-2) mol l(-1), with a Nernstian slope of 19.8+/-0.5 mV per decade and a detection limit of 6.3x10(-7) mol l(-1). It has a fast response time of <20 s and can be used for at least 3 months without any considerable divergence in potential. The proposed electrode revealed good sensitivities for Cr(III) over a wide variety of metal ions and could be used in a pH range of 2.7-6.5. Above all, the membrane sensor has been used very successfully for the analysis of some food materials and alloys for the determination of Cr(III) ion.
一种基于乙二醛双（2-羟基苯胺）的聚氯乙烯膜被制备并作为铬(III)选择性电极进行了研究。该电极的线性动态范围为 3.0x10(-6)-1.0x10(-2) mol l(-1)，Nernst 斜率为 19.8+/-0.5 mV 每 decade，检测限为 6.3x10(-7) mol l(-1)。它具有<20 s 的快速响应时间，并且在没有任何明显电位漂移的情况下可以使用至少 3 个月。该电极对各种金属离子的铬(III)具有良好的灵敏度，可在 pH 值为 2.7-6.5 的范围内使用。最重要的是，该膜传感器已成功用于一些食品材料和合金中铬(III)离子的分析。
