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The solvent extraction of methyl violet from aqueous acidic solutions by salicylic acid in xylene was studied. Inorganic acids such as hydrochloric acid (HCl), sulphuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) were used to adjust the pH of aqueous feed phase. HCl was shown to give higher efficiency of extraction and higher distribution coefficient at pH=6.0±0.1 than H ...
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