成份：蛋黄卵磷脂精华、水苏糖精华、棉子糖、果糖等。
Composition: Yolk Lecithin Essence, Stachyose Essence, Raffinose, Functose etc.
方法：用丙酮、乙醇提取蛋黄中的卵磷脂。
Method: to extract lecithin from egg yolk with acetone and ethanol.
卵磷脂是一种乳化剂，它存在于植物(例如：大豆)、鸡蛋黄和其他动物来源中。
Lecithin is an emulsifier. It is found in plants such as soybeans, in egg yolks and in other animal sources.
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