METHOD OF PREPARING PECTIN EXTRACT FOR QUANTITATIVE DETERMINATION OF PECTIN IN VEGETABLE STOCK Russian patent published in 2005 - IPC

FIELD: analytical methods.

SUBSTANCE: invention discloses method for preparation of pectin extract and can be used in production of pectin (for determining pectin substances in raw material). Method comprises triple extraction of pectin hydrates with water at 40°C followed by extraction of protopectins first with 0.3 N aqueous hydrochloric acid at 100°C and then with 1% aqueous ammonium citrate solution at 100°C. Novelty resides in preliminary treatment of vegetable stock with tenfold excess of 9.7% aqueous sodium bicarbonate solution at stirring by mechanic stirrer at 100 rpm at ambient temperature during 193 min followed by washing with tenfold excess of distilled water at ambient temperature.

EFFECT: facilitated pectin production control.

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