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研制了磷酸三丁酯(TBP)碳糊修饰电极,在含1-苯基-3-甲基-4-苯甲酰基-5-吡唑酮(PMBP)的HCl-KCl底液中,通过电位富集,将三元络合物Pb(PMBP)2(TBP)2中的铅富集在电极上,用2.5次微分阳极溶出伏安法测定铅.铅浓度在1.0×10-9~2.5×10-7mol·L-1范围内与峰高呈良好的线性关系.该电极用于铜合金和废水中铅的测定,获得满意结果.
A tributylphosphate (TBP) modified carbon paste electrode was developed. In the HCl-KCl solution containing 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) The lead was enriched in the ternary complex Pb (PMBP) 2 (TBP) 2, and the lead was determined by 2.5 differential anodic stripping voltammetry. The concentration of lead in the range of 1.0 × 10-9 ~ 2.5 × 10-7mol·L-1 showed a good linear relationship with the peak height. The electrode is used for the determination of lead in copper alloy and waste water and obtains satisfactory results.