论文部分内容阅读
在酸性介质中Ｏｓ（Ⅳ）对ＫＢｒＯ３氧化三溴偶氮胂的褪色反应有明显的催化作用，借此反应可在水相中直接测定微量锇。方法灵敏度高，锇的质量浓度为１０～２００μｇ／Ｌ时符合比尔定律，表观摩尔吸光系数为９１８×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。方法已用于贵金属精矿中锇的测定
In acidic media, Os (Ⅳ) can catalyze the discoloration of KBrO3 tribromoarsenazo, which can be used to directly measure trace osmium in aqueous media. Beer ’s law was obeyed when the mass concentration of osmium was 1 0 ~ 20 0 μg / L. The apparent molar absorptivity was 918 × 105 L · mol-1 · cm-1. The method has been applied to the determination of osmium in precious metal concentrates