7-（4-安替吡啉偶氮）-8-羟基喹啉与锆（Ⅳ）的显色反应

摘要

The conditions of color reaction of zirconium (Ⅳ)with 7-(4-antipyrinylazo )-8-hdroxyquinoline were studied .The results show that zirconium (Ⅳ) reactes with 7-(4-antipyrinylazo )-8-hdroxyquinoline in the medium of potassium hydrogen phthalate buffer solution at pH 4 .0 to form an orange yellow complex with maximum absorption wavelength at 480 nm ,the apparent molar absorption coefficient being 3 .43 × 104 L · mol-1 · cm-1 .Beers’law is obeyed in the range of 0~40 μg of zirconium (Ⅳ) mass in the 25 mL solution .%研究了7-（4-安替吡啉偶氮）-8-羟基喹啉与锆（Ⅳ）的显色反应条件。结果表明：在pH为4的邻苯二甲酸氢钾缓冲溶液中，7-（4-安替吡啉偶氮）-8-羟基喹啉与锆（Ⅳ）形成一种橘黄色的络合物，其最大吸收峰位于480 nm处，表观摩尔吸光系数为3．43×104 L · mol-1· cm-1，在25 mL溶液中，锆质量在0～40μg范围内符合比尔定律。