FIELD: analytic control of siccatives production. SUBSTANCE: siccative is dissolved in mixture of toluene and ethyl alcohol, treated with hydrochloride of hydroxylamine, ascorbic acid, acetic poising solution with pH 4 - 6 then distilled water is added till volumetric ratio of toluene : ethyl alcohol : water in mixture as 1 : 1 : (1 - 5), then it is treated with trilon 6 and sodium diethylcarbanate, chloroform is added till volumetric ratio of alcohol-toluene mixture : water : chloroform as 1 : 2.5 : 2.5. Separate from produces two-layer liquid system upper layer is subjected to titrimetry with magnesium sulfate solution. EFFECT: improved accuracy of control. 2 tbl
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