| 酸性铬兰K固体石蜡碳糊修饰电极溶出伏安法测定痕量钴 |
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| 引用本文： | 叶永康,张海丽,徐斌.酸性铬兰K固体石蜡碳糊修饰电极溶出伏安法测定痕量钴[J].湖北师范学院学报(自然科学版),1999(1). |
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| 作者姓名： | 叶永康 张海丽 徐斌 |
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| 作者单位： | 湖北师范学院化学系!黄石435002 |
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| 摘 要： | 在pH为8.5，0．2mol／L，氨性缓冲底液中，以酸性铬兰K（ACBK）为修饰剂，固体石蜡为粘合剂，制备了ACBK碳糊修饰电极。在-1．0V电位下富集，将钴以Co－ACBK络合物的形式吸附在电极上，以阳极溶出伏安法制定Co2+，在十0．106V（VS．SCE，以下同）处有灵敏的氧化峰，其一次微分峰电流与Co2+浓度在1．0X10~-12～1．0X10~－5mol／L范围内的负对数呈良好的线性关系，此法的检测下限为5.0X10~13mol／L.
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| 关 键 词： | 碳糊电极 酸性铬兰K 溶出伏安法 钴 |
DETERMINATION OF TRACE COBALT BY ANODIC STRIPPING VOLTAMMETRY METHOD(ASV) USING ACID CHROME BLUE K MODIFIED SOLID PARAFFIN WAX CARBON PASTER ELECTRODE |
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| Ye Yongkang, Zhang Haili, XuBin.DETERMINATION OF TRACE COBALT BY ANODIC STRIPPING VOLTAMMETRY METHOD(ASV) USING ACID CHROME BLUE K MODIFIED SOLID PARAFFIN WAX CARBON PASTER ELECTRODE[J].Journal of Hubei Normal University(Natural Science),1999(1). |
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| Authors: | Ye Yongkang Zhang Haili XuBin |
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| Abstract: | In this paper,solid paraffin wax carbon paste electrode modified by acid chrome blue K (ACBK)has been made. In 0. 2m/L NH3.HO2-NH4Cl solution (pH= 8. 5) cobalt was accumulated to form Co-ACBK cornplex onthe chemical modified electrode at the applied poten tial of - 1.0V. A sensitive oxidation peak of Co2+ was observedwith ASV method. The peak potential is 0. 106V(vs. SCE). The lst differential current/logarithm of concentration re lationship is linear from 1 X 10-12~ 1 X 10-5mol/L. The detect limit is 5 X 10-13mol/L. |
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| Keywords: | Carbon paste electrode Acid chrome blue K Anodic stripping voltammetry Cobalt |
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