§173.40 食品用分子筛树脂(Molecular sieve resins)

　　�� 173.40 Molecular sieve resins.

　　Molecular sieve resins may be safely used in the processing of food under the following prescribed conditions:

　　（a� The molecular sieve resins consist of purified dextran having an average molecular weight of 40,000, cross-linked with epichlorohydrin in a ratio of 1 part of dextran to 10 parts of epichlorohydrin, to give a stable three dimensional structure. The resins have a pore size of 2.0 to 3.0 milliliters per gram of dry resin （expressed in terms of water regain�? and a particle size of 10 to 300 microns.

　　（b� The molecular sieve resins are thoroughly washed with potable water prior to their first use in contact with food.

　　（c� Molecular sieve resins are used as the gel filtration media in the final purification of partially delactosed whey. The gel bed shall be maintained in a sanitary manner in accordance with good manufacturing practice so as to prevent microbial build-up on the bed and adulteration of the product.

　　更多关于美国 FDA 可直接加入食品中的辅助性食品添加剂的种类法规，请点出�a href="//www.sqrdapp.com/law/dongtai/171830.html">美国FDA 21 CFR �?73部分可直接加入食品中的辅助性食品添加剂种类汇怺�/a>