It is proposed a new topological method of adjacent matrix of esters which was constructed by taking the characteristic value of the pieces of ester compounds as principal diagonal element.
提出了拓扑方法，即考虑分子图顶点的性质，直接用酯类化合物的分子碎片的特征值为主元来构建邻接矩阵。
It not only describes the extraneous factors influencing the esterification, but also explains the internal reasons which restrict the ester value of iso-octyl salicylate.
文中讨论了影响酯化反应的外部条件，同时对制约水杨酸异辛酯酯化率的内在因素也作了相应的解释。
Demulsification and separation should be done to analyze its content, its saponification and acid value were analyzed after separation, then the ester content can be obtained.
酯类油性剂不溶于水，必须用乳化剂将其乳化，分析其含量必须先破乳、分离，分离后分析其皂化值及酸值，即可得到酯含量。
Demulsification and separation should be done to analyze its content, its saponification and acid value were analyzed after separation, then the ester content can be obtained.
酯类油性剂不溶于水，必须用乳化剂将其乳化，分析其含量必须先破乳、分离，分离后分析其皂化值及酸值，即可得到酯含量。
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