Derivative spectrophotometry as a tool for determination of stability constants of some 4-2(-pyridylazo)-resorcinol complexes with divalent metal ions

被引：5

作者：

Karpinska, J ^{[1
]}

Hryniewicka, E ^{[1
]}

机构：

[1] Univ Bialystok, Inst Chem, PL-15399 Bialystok, Poland

来源：

JOURNAL OF TRACE AND MICROPROBE TECHNIQUES | 2003年 / 21卷 / 03期

关键词：

derivative spectrophotometry; stability constant determination; PAR; Zn2+; Pd2+; ions;

D O I：

10.1081/TMA-120023061

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The suitability of derivative spectrophotometry for examination of complexation equilibria was elaborated by the determination of stability constants of Zn-PAR and Pd-PAR complexes. Derivatization minimized the influence of an excess of a colored reagent on the absorbance of the complex and allowed the direct measurement of its true value. The stability constants determined using two different methods were compared with available published data. In the case of the Zn(PAR)(2) Complex the error of determination did not exceed +/-5%.

引用

页码：443 / 453

页数：11

共 13 条

[1] RECENT DEVELOPMENTS IN DERIVATIVE ULTRAVIOLET/VISIBLE ABSORPTION SPECTROPHOTOMETERY [J].

OJEDA, CB ;

ROJAS, FS ;

PAVON, JMC .

TALANTA, 1995, 42 (09) :1195-1214

[2] Interaction of drugs with hexadecylphosphocholine micelles. Derivative spectroscopy, acid-base and solubility studies [J].

de Castro, B ;

Gameiro, P ;

Lima, JLFC ;

Matos, C ;

Reis, S .

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 2001, 18 (1-2) :71-78

[3] Partition coefficients of β-blockers in bile salt/lecithin micelles as a tool to assess the role of mixed micelles in gastrointestinal absorption [J].

de Castro, B ;

Gameiro, P ;

Guimaraes, C ;

Lima, JLFC ;

Reis, S .

BIOPHYSICAL CHEMISTRY, 2001, 90 (01) :31-43

[4]

INCZEDY J, 1979, COMPLEX EQUILIBRIA A

[5] Determination of acidity constants of acid-base indicators by second-derivative spectrophotometry [J].

Kara, D ;

Alkan, M .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2000, 56 (14) :2753-2761

[6] Second derivative spectrophotometric determination of partition coefficients of phenothiazine derivatives between human erythrocyte ghost membranes and water [J].

Kitamura, K ;

Goto, T ;

Kitade, T .

TALANTA, 1998, 46 (06) :1433-1438

[7] 2ND-DERIVATIVE SPECTROPHOTOMETRIC DETERMINATION OF PARTITION-COEFFICIENTS OF CHLORPROMAZINE AND PROMAZINE BETWEEN LECITHIN BILAYER VESICLES AND WATER [J].

KITAMURA, K ;

IMAYOSHI, N ;

GOTO, T ;

SHIRO, H ;

MANO, T ;

NAKAI, Y .

ANALYTICA CHIMICA ACTA, 1995, 304 (01) :101-106

[8] 2ND-DERIVATIVE SPECTROPHOTOMETRIC DETERMINATION OF THE BINDING CONSTANT BETWEEN CHLORPROMAZINE AND BETA-CYCLODEXTRIN IN AQUEOUS-SOLUTIONS [J].

KITAMURA, K ;

IMAYOSHI, N .

ANALYTICAL SCIENCES, 1992, 8 (04) :497-501

[9] Derivative spectrophotometric method for determination of acidity constants of single step acid-base equilibria [J].

Popovic, GV ;

Pfendt, LB ;

Moskovljevic, VM .

TALANTA, 2001, 55 (02) :363-370

[10] Derivative spectrophotometry as a tool for the determination of drug partition coefficients in water/dimyristoyl-L-α-phosphatidylglycerol (DMPG) liposomes [J].

Rodrigues, C ;

Gameiro, P ;

Reis, S ;

Lima, JLFC ;

de Castro, B .

BIOPHYSICAL CHEMISTRY, 2001, 94 (1-2) :97-106

← 1 2 →