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[求助] 不溶性膳食纤维羟基值的测定,分子量的测定

求助那位大侠,告诉我不溶性膳食纤维羟基值的测定方法,越简单越好。我查到的都是测可溶性物质的羟基值。我担心溶解之后性质会发生改变。分子量也是同样的问题,要用凝胶色谱测,但是得先溶解,不溶性膳食纤维怎么溶解。
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