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

Study on the Color Reaction of Copper(Ⅱ)with 5,10,15 Tris (4 Methyloxyphenyl) 20 (4 Propyleneoxyphenyl) Porphine Triethylammonium Bromide

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。

The conditions for color reaction of copper(Ⅱ)with 5,10,15 this(4 methyloxyphenyl) 20 (4 propyleneoxyphenyl) porphine triethylammonium bromide were studied. At pH3～4,the reaction was completed within 10 minutes at 100℃. The complex ratio is 1∶1, and the apparent molar absorption coefficients of determination of Copper(Ⅱ)is 4.95×10 5L·mol -1 · cm -1 at 416 nm.Beer's law is obeyed in the range of 0～2.0μg/10 mL. The proposed method has been applied to the spectrophotometric determination of trace copper in the water with satisfactory results. The conditions for color reaction of copper(Ⅱ)with 5,10,15 this(4 methyloxyphenyl) 20 (4 propyleneoxyphenyl) porphine triethylammonium bromide were studied. At pH3～4,the reaction was completed within 10 minutes at 100℃. The complex ratio is 1∶1, and the apparent molar absorption coefficients of determination of Copper(Ⅱ)is 4.95×10 5L·mol -1 · cm -1 at 416 nm.Beer's law is obeyed in the range of 0～2.0μg/10 mL. The proposed method has been applied to the spectrophotometric determination of trace copper in the water with satisfactory results.