结果测定总甘油相对不精密度小于2 % ，游离甘油小于4% ；
Results The total glycerol procedure showed coefficients of variation ( CVs) of less than 2% and free glycerol of less than 4%.
结论部分品牌的生化质控血清含大量的游离甘油，两法测定质控血清的结果可能出现明显差异。
Conclusion Some quality control serum contained considerable free glycerol, and this may cause significant difference in the quality control serum when measured by two methods.
通过水洗可以很容易去除粗生物柴油中的游离甘油，但是水洗不仅会产生大量工业废水，而且增加产品成本。
In this work, the process of the biodiesel production from rapeseed oil and the crude biodiesel washing has been provided.
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