A differential pulse anodic stripping voltammetry was developed for the sensitive and selective determination of Pb(Ⅱ) at a 2，4，6-tri(3，5-dimethylpyrazoyl)-1，3，5-triazine modified carbon paste electrode. The analysis procedure consisted of an open circuit accumulation step in stirred sample solution，a medium exchange step to a clean solution and subsequently a anodic potential stripping step.The current was proportional to the concentration of the Pb(Ⅱ) ion in a range from 5.1×10－8 to 8.0×10-5 mol／L for 5min accumulation，while most of metal ions did not interfere the determination.The developed method was applied to Pb(Ⅱ) determination in tap water.%用2，4，6-三(3，5-二甲基吡唑)-1，3，5-三嗪(TDT)制得碳糊修饰电极，在pH=5.5的HAc-NaAc缓冲溶液中，将Pb(Ⅱ)富集在电极上，用差示脉冲阳极溶出伏安法测定铅，Pb(Ⅱ)的浓度在5.1×10-8～8.0×10-5mol／L范围内与峰高呈良好的线性关系．该电极用于测定自来水中铅(Ⅱ)的含量，效果满意．
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