KBrO_3-5-Br-PADAP体系痕量铂的催化动力学光度法测定  

Catalytic kinetic spectrophotometric determination of trace platinum with KBrO_3-5-Br-PADAP system

作　　者：周之荣[1] 魏家文 

机构地区：[1]华东地质学院应用化学系,江西抚州344000 [2]中油集团兰州石化公司动力原料厂质检中心,甘肃兰州730060

出　　处：《冶金分析》2001年第4期45-47,共3页Metallurgical Analysis

摘　　要：基于痕量铂 在稀硫酸介质中对溴酸钾氧化 2 ( 5 溴 2 吡啶偶氮 ) 5 二乙氨基酚褪色反应的催化作用 ,建立了测定痕量铂 的动力学光度法。方法的检出限为 9 0× 1 0 -11g/mL ,线性范围为 0～ 0 2 μg/ 2 5mL。用于合成样品及含铂催化剂中铂 的测定 ,结果令人满意。A new kinetic spectrophot ometric method for the determinati on of trace platinum*$ has been de veloped,the method is based on the catalytic effect of trace Pt*$ on oxidation of 2-(5-bromo-2-pyridyla zo)-5-diethylaminophenol(5-Br-PADA P)with potassium bromate in the dilute solution of sulfuric acidThe detecti on limit is 90×10 -11 g/mL and the linear range is 0-02μg/25mLThe m ethod has been applied to the dete rmination of platinum*$ in Pt-Re c atalyst and the results obtained p roved to be satisfactory

关 键 词：催化动力学光度法 溴酸钾 铂(IV) 测定 含铂催化剂 PADAP 

分 类 号：O657.3[理学—分析化学]