Mass balance method is based on the premise that the total mass fraction of the tested substance is 100％,the organic purity of n-cetane is calculated by gas chromatography area normalization method,the water content is determined by Carl Fischcullen method,the volatile component content is determined by chromatography,and the non-volatile component content is determined by ICP-MS.After deducting the measured impurities,the purity of n-cetane is obtained.This method is the standard method of purity determination,and is widely used in the purity determination of n-hexadecane and other organic compounds.
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