【摘要】 在ｐＨ１．５的硝酸介质中，铁（Ⅲ）－柠檬酸配合物在紫外光照射下生成一种红紫色的配合物，其最大吸收波长为４００ｎｍ。在选定条件下，柠檬酸浓度在０．５～８０ｍｇ／Ｌ范围内与吸光度Ａ值成正比，其摩尔吸光系数为１．３６×１０３Ｌ／（ｍｏｌ．ｃｍ）。方法具有选择性好、灵敏度高、简便快速等特点，已用于实际样品分析。更多还原

【Abstract】 Under the conditions of pH 1 5 HNO medium Fe(Ⅲ)-citric acid complex was irradiated by ultravoilet light to form a red-voilet complex,the molar absorptivity of the complex is 1 360L/(mol.cm) at 400nm,Beer’s law is obeyed in the range of 0 5～80 mg/L for citric acid.The method has shown that the advantages of this reaction are high sensitivity,good selectivity,simple and rapid,and has been applied to the determination of citric acid in drinking samples.更多还原