研究了新试剂溴化５，１０，１５－三（对甲氧基苯基）２０－丙氧苯基卟啉三乙铵与铜的显色反应。在ｐＨ ３～４ 的弱酸性介质中，沸水浴加热１０ ｍ ｉｎ，试剂与铜形成１∶１ 的络合物。λｍ ａｘ＝ ４１６ｎｍ ，在０～２．０ μｇ／１０ ｍ Ｌ范围内吸光度与铜的浓度关系符合比耳定律，ε＝４．９５×１０５ Ｌ·ｍ ｏｌ－ １·ｃｍ － １。该法具有灵敏度高和选择性好的特点，用于测定水样中痕量铜，结果满意 The chromogenic reaction of copper (III) with 5,10,15-tris (p-methoxyphenyl) 20-propoxyphenyl porphyrin triethylammonium bromide was studied. In a mildly acidic medium at pH 3-4, a boiling water bath is heated for 10 min, and the reagent forms a 1: 1 complex with copper. λm ax = 416nm. Beer ’s law was obeyed by the relationship between absorbance and copper concentration in the range of 0 ~ 2.0 μg / 10 m L, ε = 4.95 × 105 L · m ol - 1 · cm - 1. The method has the characteristics of high sensitivity and good selectivity for the determination of trace amounts of copper in water samples, with satisfactory results