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The effect of the modifier 1-decanol on the extraction of tartaric acid by the extractants tri- n -octylamine (TOA), quaternary ammonium chloride (Aliquat 336), or their mixture in the diluent n -dodecane was studied at different pH values. The effect of the modifier was examined as a function of the initial pH value of the aqueous solution for the three extractants mentioned above. A positive, negative, or no effect of the modifier on the distribution coefficient of tartaric acid was observed in the different cases.
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Marinova et al. (2005) studied this question.
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