FIELD: food industry.
SUBSTANCE: method for extracting pectin substances includes washing the raw materials with water, grinding, sonication, hydrolysis and extraction, precipitation of pectin substances and their purification from the pectin-containing extract with ethyl alcohol. The sonication is carried out at the fixed frequency of 350 Hz, with the subsequent hydrolysis and extraction at the temperature of 55°C with the 1% solution of ammonium oxalate for 45-50 minutes. The obtained pectin-containing extract is purified and pectin substances are precipitated with ethyl alcohol with the addition of sodium chloride salt in the amount not exceeding 10 g per litre of the alcohol. Wherein the sonication is carried out for 20 minutes at the temperature of 40°C.
EFFECT: invention allows to increase the yield of pectin and does not require the use of strong mineral acids as an extractant.
3 ex
| Title | Year | Author | Number |
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