【摘要】 研究了偶氮胂与铬（Ⅲ）的显色反应，结果表明：加热煮沸５ｍｉｍ，配合物形成完全配合物最大吸收波长６１０ｎｍ，摩尔吸光系数为２．１×１０￣４Ｌ／ｍｏｌ·ｃｍ，铬（Ⅲ）的测定范围在０～６０μｇ／５０ｍＬ内符合朗白－比耳定律。本法回收率９５％～１００％。应用于天然木和工业废水中铬（Ⅲ）的直接测定。更多还原

【Abstract】 The Chromogenic reation of Cr(Ⅲ) with arsenazo Ⅲ have been studied.The results show that complex formation reation can be complete by heating at 100℃ for 5 min. The most absorption band of the complex lies at 610 nm. The apparent molar absorptivity is 2.1× 10~4L mol. cm. Lambert-Beer law is obeyed for Cr(Ⅲ) in the concentration range 0~60 mg/50 mL. The range of the recovery is 95%~100%. The metbod has been applied to the determination of Cr(Ⅲ) in water and industriat water water.更多还原