Polyester resins are the condensation products of polybasic acids and polyols.
树脂 是多元酸和多元羟基化合缩聚而成。
Objective To analyze polybasic acids and higher fatty acids of Rosa roxburghii Tratt fruit.
目的分析刺梨果中多元酸和高级脂肪酸的组成。
Simulated sample and mixed reaction solution of polybasic acids are analyzed in comparison with the results of ion-chromatography. The calculation error is less than 7%.
本法用于分析模拟样品和混合弱酸反应液，并用离子色谱法进行对照，计算误差小于7%。
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