CAJ | 학술논문

在碱性介质中，锇(Ⅳ)对KIO4氧化偶氮氯膦-mA的褪色反应有明显的催化作用，据此建立了催化光度法测定微量锇(Ⅳ)的新方法，并用正交实验设计对反应条件进行了优化。方法的检测限为2.0μg/L。锇(Ⅳ)含量在7.0～25.0μg/L范围内服从比尔定律。此方法已用于贵金属精矿和二次合金中微量锇的测定，相对误差均为0.9％，回收率在95.38％～106.0％之间。
재감성개질중，철(Ⅳ)대KIO4양화우담록련-mA적퇴색반응유명현적최화작용，거차건립료최화광도법측정미량철(Ⅳ)적신방법，병용정교실험설계대반응조건진행료우화。방법적검측한위2.0μg/L。철(Ⅳ)함량재7.0～25.0μg/L범위내복종비이정률。차방법이용우귀금속정광화이차합금중미량철적측정，상대오차균위0.9％，회수솔재95.38％～106.0％지간。
A catalytic spectrophotometric method for the determination of micro amounts of osmium has been established based on the catalytic action of Os(Ⅳ) on the oxidation fading reaction of chlorophosphonazo-mA with KIO4 in alkaline-medium. The reaction conditions were optimized by orthogonal experimental design. The detection limit for osmium was 2.0 μg/L.Beer＇s law was obeyed in the range from 7.0 to 25.0 μg/L for Os(Ⅳ). The method has been applied to the determination of micro amounts of Os(Ⅳ) in concentrate of noble metals and secondary alloy,both of the relative errors were 0.9%. Recoveries varied from 95.38% to 106.0%.