5-Br-PADAP用作铂的新光度试剂及微量铂和钯的同时分光光度测定

高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (4): 315.

5-Br-PADAP用作铂的新光度试剂及微量铂和钯的同时分光光度测定

方国桢, 刘鑫

四川大学化学系

收稿日期:1985-03-13 出版日期:1986-04-24 发布日期:1986-04-24

2-(5-Bromo-2-pyridylazo)-5-dietylaminophenol as a New Photometric Reagent for Platinum(Ⅳ) and Simul-taneous Spectrophotometric Determination of Microamounts of Platinum(Ⅳ) and Palladium (Ⅱ)

Fang Guozhun, Liu Xin

Department of Chemistry, Sichuan Unitersity, Chengdu

Received:1985-03-13 Online:1986-04-24 Published:1986-04-24

摘要/Abstract

摘要： 本文研究了5-Br-PADAP在非离子表面活性剂OP存在下与Pt(Ⅳ)、Pd(Ⅱ)的显色反应,提出了灵敏、简便的光度法测Pt且不经分离仅利用两反应所需温度差异,同时分光光度测Pd和Pt的新方法。

Abstract: New, sensitive and simple methods for spcctrophotometric determination of platinum(Ⅳ) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) and for simultaneous determination of palladium(Ⅱ ) and platinum( Ⅳ ) based on the difference in temperature required for complex formation reactions between the two metal ions and 5-Br-PADAPhave been respectively developed. On adding nonionic surfactant polyethyleneglycol octylphenylester (OP), the colour of Pd(Ⅱ)-5-Br-PADAPcomplex in the aq. medium become very stable; the formation reaclion of Pl( Ⅳ )-5-Br-PADAPcomplex was greatly accelerated and the sensitivity of this colour rcaction enormously increased. 35 common foreign ions do not interfere with the simultaneous or respective determination of Pd( Ⅱ ) and Pt(Ⅳ). The coefficients of variation are 0.14-3.6% (n=5). Good recoveries (97-109%) of palladium( Ⅱ ) and platinum(Ⅳ) in the mixtures were obtained without any separation or masking.

TrendMD:

方国桢, 刘鑫. 5-Br-PADAP用作铂的新光度试剂及微量铂和钯的同时分光光度测定. 高等学校化学学报, 1986, 7(4): 315.

Fang Guozhun, Liu Xin . 2-(5-Bromo-2-pyridylazo)-5-dietylaminophenol as a New Photometric Reagent for Platinum(Ⅳ) and Simul-taneous Spectrophotometric Determination of Microamounts of Platinum(Ⅳ) and Palladium (Ⅱ). Chem. J. Chinese Universities, 1986, 7(4): 315.