催化动力学分光光度法测定痕量锇  

Catalytic Kinetic Spectrophotometric Determination of Trace Osmium

作　　者：黄章杰[1] 胡秋芬[2] 尹家元[2] 徐其亨[2] 

机构地区：[1]云南大学科研处,昆明650091 [2]云南大学化学系,昆明650091

出　　处：《分析化学》2001年第12期1437-1439,共3页Chinese Journal of Analytical Chemistry

基　　金：云南省教育厅科学研究基金资助课题 (No .991114 7)

摘　　要：在磷酸介质及加热条件下 ,锇 对KBrO3氧化二氨替比林基 对二甲氨基苯基甲烷 (DAMAM)显色反应有强烈的催化作用 ,由此建立了测定痕量锇的催化动力学分光光度分析法。体系催化反应 (吸光度为A)和非催化反应 (吸光度为A0 )的最大吸收波长均为 5 4 0nm ,锇含量在 0～ 14 μg L范围内与 (A -A0 )呈线性关系 ,检出限为 1.82× 10 - 9g mL ,方法用于冶金产品和贵金属精矿中痕量锇的测定 。A catalytic kinetic spectrophotometric method for the determination of trace osmium (IV) has been established, which is based on its catalytic effect on the oxidative colour reaction of diantipyryl-(p-dimethylamino)phenylmethane (DAMAM) with potassium bromate in phosphoric acid medium on heat water bath. Both the catalytic reaction and uncatalytic reaction produce maximum absorption wavelength at 540 nm. The linear range of the determination is 0 similar to 14 mug/L for Os(IV), The detection limit is 1.82 x 10(-9) g/mL. The method has been applied to the determination of trace osmium in metallurgical product and refined ores with satisfactory results.

关 键 词：二氨替比林基-对二甲氨基苯基甲烷 催化分光光度法 锇 溴酸钾 测定 痕量分析 冶金产品 贵金属精矿 

分 类 号：O657.3[理学—分析化学]