An investigation of the Fe 3+ - sulphonated pyrogallol system in aqueous solutions
Pješčić M.G., Veselinović D.S., Komnenić V.P. and 1 more
Journal of the Serbian Chemical Society · 2000
doi:10.2298/jsc0004255p (opens in a new tab)
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Abstract
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 β2 = 5.08±0.26 and log β2 = 6.31 ±0.04, respectively.
Abstract licence: CC BY
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