本文合成了meso-四-(3-N-甲基吡啶)卟啉[T(3-MPy)P],并研究了它与铅的络合反应。应用铅-T(3-MPy)P络合物的Soret带,制定了光度测定微量铅新的高灵敏度的方法。络合物形成反应在室温下可迅速进行,它的Soret带在472nm。当铅的含量达800ppb时,仍可得到直线的工作曲线。络合物的表观摩尔吸光系数为2.53×10~5。研究了其它离子的干扰及确定了容许量。 In this paper, the meso-tetrakis (3-N-methylpyridine) porphyrin [T (3-MPy) P] was synthesized and its complexation with lead was studied. The Soret tape of lead-T (3-MPy) P complex was used to develop a new highly sensitive method for the photometric determination of trace lead. The complex formation reaction proceeds rapidly at room temperature with a Soret band at 472 nm. When the lead content of 800ppb, can still get a straight line of the working curve. The apparent molar absorptivity of complex was 2.53 × 10 ~ 5. Studied the interference of other ions and determined the allowable amount.