FIELD: food industry and detergents. SUBSTANCE: alkali metal citrate is obtained from aqueous solution, e.g. fermentation broth, by adjusting its pH to more than 5.4, preferably 8.5. Said solution is then made to contact with polymeric adsorbent, e.g. slightly basic anion exchange resin. Adsorbent is washed with alkali metal hydroxide or salt solution to recover aqueous solution of alkali metal citrate. The claimed method is simple to be accomplished. EFFECT: more efficient preparation method. 10 cl, 1 ex, 1 tbl
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