POTENTIOMETRIC DETERMINATION OF THE IRON CONTENT OF THE SAPONIFICATION BATH.

被引：0
|
作者：
Kremer, V.A.K.
Svetlova, L.P.
Borovskii, A.M.
Andreeva, L.T.
Biber, B.L.
Kuz'mina, N.L.
Kudryavtseva, G.V.
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来源：
Fibre chemistry | 1987年 / 19卷 / 03期
关键词：
CHEMICAL REACTIONS - Redox - COMPUTER PROGRAMMING - Algorithms - IRON AND ALLOYS - Measurements - POTASSIUM COMPOUNDS - SULFUR COMPOUNDS - Oxidation;
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摘要：
The authors describe a procedure for the potentiometric complexometric determination of iron in a saponification bath, in the concentration range of 1-20 mg/dm**3. The procedure includes the following steps: (1) Conversion of all the iron compounds into the ionic state, to do which the sample top be analyzed is acidified to pH 1. 8-1. 9, controlling the pH with a glass electrode. This pH value is optimum for further operations. (2) Conversion of Fe**2** plus to Fe**3** plus , for which an oxidant is added to the sample for analysis, to oxidize sulfite ion and Fe**2** plus . For this purpose one can use only those oxidants which do not form a redox system after reduction that interferes with the complexometric titration of Fe**3** plus , which is based on a change in the redox potential of the Fe**3**30 /Fe**2**30 system.
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页码：244 / 246
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