| PVC-铋粉修饰碳糊电极的研制与铬黑T离解常数的测定 |
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| 引用本文： | 夏新泉,陈灵,易林青.PVC-铋粉修饰碳糊电极的研制与铬黑T离解常数的测定[J].湖北师范学院学报(自然科学版),2014(3):83-87. |
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| 作者姓名： | 夏新泉 陈灵 易林青 |
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| 作者单位： | 湖北师范学院化学化工学院 |
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| 摘 要： | 采用循环伏安法研究了该修饰电极在碱性B-R缓冲溶液中的电化学行为。研制了铋粉修饰PVC-碳糊电极，实验发现，在碱性条件下（ pH大于9时），其还原峰电流与溶液pH值呈良好的线性关系（ r＝0．9991）.采用循环伏安法，结合分光光度法测定了铬黑T三级离解常数pKa311．32，相对误差为2．0％.
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| 关 键 词： | PVC-铋粉修饰碳糊电极 循环伏安法 铬黑T的pKa3 |
Determination of dissociation costant of EBT by PVC-bismuth powder-modified carbon paste electrode |
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| XIA Xin-quan;CHENG Ling;YI Lin-qing.Determination of dissociation costant of EBT by PVC-bismuth powder-modified carbon paste electrode[J].Journal of Hubei Normal University(Natural Science),2014(3):83-87. |
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| Authors: | XIA Xin-quan;CHENG Ling;YI Lin-qing |
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| Institution: | XIA Xin-quan;CHENG Ling;YI Lin-qing;College of Chemistry and Chemical Engineering,Hubei Normal University; |
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| Abstract: | A novel PVC carbon paste electrode modified with bismuth powder （ PVC-Bi-CPE） was prepared in this paper . The electrochemical behave of the modified carbon paste electrode was investigated in basic B -R buffer solution by cyclic vol-tammetry.The results indicated that the reduction peak currents were in linear relationship with the pH （the linear correlation coefficient was 0.9991） in the condition of basic solution（pH＆gt;9）.This novel modified electrode was applied to the determi-nation of 3-order dissociation constant （ pKa3 ） of BET Coupling with spectrophotometry in basic B -R buffer solution and the result showed that pKa3 BET=11.32 with a relative error of 2.0%. |
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| Keywords: | PVC-Bi-CPE cyclic voltammetry pKa3 BET |
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