研究了新合成的水溶性卟啉试剂meso 四 ( 4 羧甲氧基苯 )卟啉 (TCMOPPH2 )与钯 的显色反应条件 ,在pH3 5,表面活性剂TritonX 1 0 0存在下 ,钯 与TCMOPPH2 形成稳定的 1∶1络合物 ,表观摩尔吸光系数ε487nm=4 35× 1 0 5。钯 量在 0～ 2 5μg/1 0mL范围内符合比尔定律。方法有较高的灵敏度和较好的选择性 ,应用于催化剂中钯的分析 ,结果与其ICP值一致。 The conditions for the color reaction of the newly synthesized water-soluble porphyrin reagent meso tetra (4-carboxymethoxybenzene) porphyrin (TCMOPPH2) with palladium were studied. Under the condition of pH3 5 and surfactant TritonX1 0 0, palladium and TCMOPPH2 The formation of a stable 1: 1 complex, the apparent molar absorptivity ε487nm = 435 × 105. Beer’s law is obeyed in the range of 0 ~ 25μg / 10mL. The method has higher sensitivity and better selectivity, and is applied to the analysis of palladium in the catalyst. The result is consistent with its ICP value.