碱法脱酯制取低甲氧基果胶的研究

RESEARCH ON EXTRACTING LOW-METHOXYL PECTION BY ALKALIDE-ESTERIFICATION METHOD

对碱法脱酯制取低甲氧基果胶的条件及影响因素进行了研究。结果表明，最佳脱酯条件为ｐＨ值１２．０、温度２５℃、时间６０ｍｉｎ。用０．８％试验产品和２０ｍｇ／ｇ果腔的Ｃａ＋＋制作的低糖草毒酱，风味、色泽好，品体稳定。

Aresearch was made on the factors and conditioiis of extracting low-methoxyl pec-tion(LMP) by alkali de-esterification method from lemen peel. The result showed thatthe optimuln conditions for de-esterification was to regulate pH to 12. 0 and de-esterifyat 25℃ for 60 minutes,0.8% LMP obtained by this method and 20 mg/g LMP Ca￣(2+)wereused to rnake low-sugar strawberry jam and resulted in satisfactory quality.