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用高效液相色谱法，以低分子肝素的标准对照品为标准，测定了低分子肝素的平均分子量。其重均分子量范围在3500～5000，分子县在8000以下者占85％以上。对该法的实验条件进行了探讨。
The average molecular weight of low molecular weight heparin was determined by HPLC and standard reference substance of low molecular weight heparin. The weight average molecular weight in the range of 3500 to 5000, molecular count below 8000 accounted for more than 85%. The experimental conditions of the law are discussed.