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制备了邻菲口罗啉化学修饰碳糊电极，在含噻吩甲酰三氟丙酮的ＨＡｃ－ＮａＡｃ体系中，Ｃｏ（Ⅱ）离子经化学富集在电极表面上形成三元络合物．采用２．５次微分伏安法测定痕量Ｃｏ（Ⅱ）离子．Ｃｏ（Ⅱ）浓度在８．０×１０－９～７．０×１０－７ｍｏｌ·Ｌ－１范围内与阳极溶出峰峰高成良好的线性关系，检出限达１．２×１０－９ｍｏｌ·Ｌ－１．电极用于水样中钴的测定，结果令人满意．
In the HAc-NaAc system containing thiophanoyl trifluoroacetone, Co (Ⅱ) ions were chemically enriched on the surface of the electrode to form ternary complexes. Determination of Trace Co (Ⅱ) Ion by 2.5 Times Differential Voltammetry. The concentration of Co (Ⅱ) in the range of 8.0 × 10-9 ~ 7.0 × 10-7mol·L-1 has a good linear relationship with the peak height of anodic dissolution, the detection limit is 1.2 × 10-9mol · L-1. Electrode for the determination of cobalt in water samples, the results are satisfactory.