5-(4-氯苯基偶氮)-8-苯磺酰氨基喹啉与钯(Ⅱ)的显色反应及其分析应用  

The color reaction of palladium(Ⅱ) with 5-(4-chlorophenylazo)-8-(benzene sulfonamido) quinoline and its analytical application

作　　者：杨孝容[1] 曹秋娥[2] 李祖碧[3] 徐其亨[2] 

机构地区：[1]乐山师范学院化学系,乐山614004 [2]云南大学生化学院化学系,昆明650091 [3]云南大学成人教育学院,昆明650091

出　　处：《化学试剂》2002年第4期216-218,共3页Chemical Reagents

摘　　要：研究了新显色剂 5 -(4 -氯苯基偶氮 ) -8-苯磺酰氨基喹啉 (CPBSQ )与钯的显色应反应。对 3 0多种常见离子进行了试验 ,发现没有离子对 Pd( )的测定产生严重干扰。用此法测定催化剂中钯的含量 。A color reaction between palladium(Ⅱ) and a new color reagent,5 (4 chlorophenylazo) 8 (benzene sulfonamido) quinoline (CPBSQ) was studied.The results indicated that CPBSQ could react with Pd(Ⅱ) to form a 2∶1 complex in the pH range of 9.0~12.0 and present of CPC and NaF KNaC 4H 4O 6.The molar absorption extinction of the complex is 8.14×10 4 L·mol -1 ·cm -1 at the wavelength of 615 nm.Beer′s law is obeyed in the Pd(Ⅱ) concentration range of 0.0~22.0 μg/25 mL.More than 30 kinds of foreign ions studied do not interfere with the determination of equal concentration of Pd(Ⅱ).The method is more sensitive and of good selectivity.It has been used for the determination of palladium in catalysts with satisfactory results.

关 键 词：显色反应 分析 钯 分光光度法 5-(4-氯苯基偶氮)-8-苯磺酰氨基喹啉 催化剂 

分 类 号：O614.823[理学—无机化学] O657.32[理学—化学]