FIELD: chemistry.
SUBSTANCE: invention relates to analytical chemistry. A method of extracting indium (III) ions includes extraction thereof from aqueous solutions with a derivative from a pyrazolone group, followed by complexometric determination of indium (III). The derivative from a pyrazolone group used is antipyrine. Extraction is carried out with an organic reagent containing antipyrine and sulphosalicylic acid with addition of a salting-out agent at medium pH of 2.0. The salting-out agent used is sodium sulphate or ammonium sulphate. The indicator used during complexometric determination of indium (III) is xylenol orange.
EFFECT: invention improves selectivity of extracting indium (III) without using volatile, inflammable and toxic organic solvents.
2 cl, 4 dwg, 3 ex, 1 tbl
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