Selective stopped-flow injection spectrophotometric determination of palladium(II) in hydrogenation and automobile exhaust gas converter catalysts

被引:16
作者
Anthemidis, AN [1 ]
Themelis, DG [1 ]
Stratis, JA [1 ]
机构
[1] Aristotelian Univ Salonika, Dept Chem, Analyt Chem Lab, GR-54006 Salonika, Greece
关键词
palladium; spectrophotometry; stopped-flow injection; hydrogenation and automobile catalysts;
D O I
10.1016/S0003-2670(00)00751-0
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A stopped-flow injection spectrophotometric method is reported for the determination of palladium(II), using 2,2'-dipyridy-2-pyridylhydrazone (DPPH) as a colour forming reagent. The absorbance of the Pd(II)-DPPH complex was monitored at 540 nm, at pH approximate to 0.3. The various chemical and physical parameters were optimized and a study of interfering ions was also carried out. The calibration graph has two linear parts, first in the range 0-25 mg l(-1) (s(r)=0.44%, r=0.9999) with a detection limit of c(L)=0.084 mg l(-1) and the second in the range 25-60 mg l(-1) (s(r)=1.6%, r=0.9996). In both cases the sampling rate was 30 injections per hour. The method is very selective because the strongly acidic medium used prevented the formation of complexes of the reagent with other ions. The method was successfully applied to the determination of palladium in hydrogenation and automobile exhaust gas converters catalysts. The relative standard deviation of the mean values and the recovery ranged between 0.6 and 1.6% and 97.0-102.6%, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:161 / 167
页数:7
相关论文
共 15 条
[1]  
ALEXAKITZIVANID.H, 1972, THESIS U THESSALONIK
[2]   SPECTROPHOTOMETRIC DETERMINATION OF IRON WITH 2,2'-DIPYRIDYL-2-PYRIDYLHYDRAZONE [J].
ALEXAKITZIVANIDOU, H .
ANALYTICA CHIMICA ACTA, 1975, 75 (01) :231-234
[3]   NEW DEVICE FOR IMPROVING SENSITIVITY AND STABILIZATION IN FLOW-INJECTION ANALYSIS [J].
BERGAMIN, H ;
REIS, BF ;
ZAGATTO, EAG .
ANALYTICA CHIMICA ACTA, 1978, 97 (02) :427-431
[4]  
COWLEY A, 1997, PLATINUM 1997
[5]  
DANIELIS F, 1970, EXPT PHYSICAL CHEM
[6]   UTILIZATION OF KINETIC-BASED FLOW-INJECTION METHODS FOR THE DETERMINATION OF CHLORINE AND OXYCHLORINE SPECIES [J].
GORDON, G ;
YOSHINO, K ;
THEMELIS, DG ;
WOOD, D ;
PACEY, GE .
ANALYTICA CHIMICA ACTA, 1989, 224 (02) :383-391
[7]   Fl spectrophotometric determination of Pd with DBOK-chlorophosphonazo [J].
Huang, J ;
Chen, XG ;
Ho, Z ;
Zhao, ZF ;
Hooper, M .
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 1999, 363 (01) :117-118
[8]  
INCZEDY J, 1998, COMPENDIUM ANAL NOME, P2
[9]   ANALYSIS OF GLASS AND CERAMIC FRIT BY ATOMIC ABSORPTION SPECTROPHOTOMETRY [J].
JONES, AH .
ANALYTICAL CHEMISTRY, 1965, 37 (13) :1761-&
[10]  
KARLBERG B, 1989, FLOW INJECTION ANAL, P47