ferric citrate preparation or sources

1, the citric acid was added to a solution of ferric hydroxide, heated to 60 ℃ less concentrated by evaporation to a slurry obtained by drying the glass temperature.
2, the ammonia solution added to sulfate,buffered lactic acid hydroxide precipitate. Filtered, washed with water to free sulfuric acid. Lactic acid was added, heated with stirring to below 60 ℃, the precipitate is dissolved, followed by filtration. The filtrate was concentrated by heating at 60 ℃ less a syrup on a glass plate coated with a thin layer, the formation of small leaves, peel, tepid, drying derived.