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在pH为8．5，0．2mol/L氨性缓冲底液中，以酸性铬蓝K（ACBK）为修饰剂，固体石蜡为粘合剂，制备了ACBK修饰碳糊电极。Pb2+以Pb-ACBK络合物的形式吸附在电极上，在-1．0V电位下电解，以阳极溶出伏安法测定Ph2+，在0．11V（vs.SCE）处有灵敏的氧化峰，其一次微分峰电流与Pb2+浓度在1．0×10-11～1．0×10-5mol/L范围内的对数呈良好的线性关系。此法的检测限为5．0×10-12mol/L。
ACBK modified carbon paste electrode was prepared with acidic chrome blue K (ACBK) as modifier and paraffin wax as binder at pH 8.5 and 0.2 mol / L ammonia buffer solution. Pb2 + was adsorbed on the electrode in the form of Pb-ACBK complex and was electrolyzed at -1.0V. Ph2 + was determined by anodic stripping voltammetry with a sensitive oxidation peak at 0.11V (vs.SCE) The first derivative current showed a good linear relationship with the logarithm of Pb2 + concentration in the range of 1.0 × 10-11 ~ 1.0 × 10-5mol / L. The detection limit of this method is 5.0 × 10-12mol / L.