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。
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.
出处
《分析测试技术与仪器》
CAS
1997年第3期152-155,共4页
Analysis and Testing Technology and Instruments
关键词
柠檬酸
光化学反应
分光光度法
铁配合物
citric acid\ HNO 3\ photochemical reaction\ spectrophotometry
