高碘酸钾-二安替比林对碘苯基甲烷体系催化光度法测定痕量钌(Ⅲ)  

Spectrophotometric Determination of Trace Ruthenium (Ⅲ) Based on Its Catalytic Effect on the Potassium Periodate- Diantipyryl-(p-iod)-phenylmethane Reaction

作　　者：陈吉书[1] 徐其亨[2] 

机构地区：[1]云南曲靖师范高等专科学校化学系,曲靖655000 [2]云南大学化学系,昆明650091

出　　处：《分析化学》2000年第9期1144-1146,共3页Chinese Journal of Analytical Chemistry

摘　　要：合成了新试剂二安替比林对碘苯基甲烷（ＤＡｐＩＭ），研究了在磷酸介质中钌（Ⅲ）催化高 碘酸钾氧化ＤＡｐＩＭ的显色反应，建立了一种测定痕量钉的催化光度分析法。方法的线性范 围为 ０～６ μｇ／Ｌ；检测限为１．６ × １０－７ｇ／Ｌ。该体系灵敏度高，稳定性好，用于矿样中痕量钉的 测定，其相对标准偏差为３．０％～４．１％，标准加入回收率为９７％１０５％。A reagent, diantipyryl-(p-lod)-phenylmethane (DApIM) was synthesized and identified, and a kinetic spectrophotometric method for the determination of trace ruthenium based on the catalytic effect of Ru on the oxidative reaction of diantipyryl-(p - iod ) - phenylmethane with potassium periodate in phosphoric acid medium was proposed. The linear range of the method is 0 - 6 μg/L,and the detection limit is 1.6 ×10-7 g/L. This mthod has the advantage of high sensitivity and good stability. It has been applied to determine trace ruthenium in ores with the recovery of 97% - 105% and relative standard deviation of 3.0% - 4. 1% (n = 6).

关 键 词：钌 高碘酸钾 催化光度法 矿物 痕量分析 DAPZM 

分 类 号：O614.821[理学—无机化学] P575.4[理学—化学]