Open AccessAn investigation of the Fe 3+ - sulphonated pyrogallol system in aqueous solutions
Author(s) -
Miljan G. Pješčić,
Dragan Veselinović,
V. Komnenić,
I.V. Draskovic
Publication year - 2000
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc0004255p
Subject(s) - pyrogallol , aqueous solution , chemistry , stability constants of complexes , electrochemistry , inorganic chemistry , relative standard deviation , nuclear chemistry , analytical chemistry (journal) , chromatography , detection limit , electrode , organic chemistry
The electrochemical behaviour of the Fe 3+ -sulphonated pyrogallol (SP) complex was investigated and its composition and stability constants were determinated at pH 2.30. It was found by voltammetric and spectrophotometric measurements that Fe 3+ and SP form a complex of the ML2 type, which is relatively stable during the first 30 minutes. The optimal pH value for complex formation is between 2.30 and 2.80. The relative stability constants determined by voltammetric and spectrophotometric measurements are log ?2 = 5.08?0.26 and log ?2 = 6.31 ?0.04, respectively.