摘要：乳化液的皂化值是其润滑性和清洁度的重要指标，通过优化测定条件的研究能够更为有效快捷的掌握乳化液的皂化值，从而确定乳化液的理化性质。采用国标法测定乳化液的皂化值，同时在一定温度下改变回流皂化时间，探讨国标法测定乳化液皂化值的皂化时间，并对测定结果进行分析。实验结果表明，皂化时间为60min最为准确合理，测定结果准确可靠，具有较好的相关性。对实验室准确方便测定乳化液的皂化值具有一定的适用性。

关键词：乳化液；国标法； 皂化值； 皂化温度

Abstract：Saponification number of the emulsion is an important index of its unctuosity and cleanliness.We can grasp the saponification number of the emulsion more quickly and more efficient by optimize the research of determination condition and ascetain its physicochemical property.We employ national standard method to determine saponification number of the emulsion,in the meantime ,change backflow of saponification's time.Having discussed about employing national standard method to determine saponification number of the emulsion and analyse the results,it shows that 60min is the most reasonable.The ruselt1,which is reliable and has preferable relevance,is applicative to determine the saponification number of the emulsion accurately and expediently in labs.

Key words: emulsion; national standard method; Saponification number; saponification's time