基于微扰理论并借助于统计缔合流体理论的基本思路,建立了氨基酸和糖水溶液密度的状态方程.计算了甘氨酸、丙氨酸、缬氨酸、氨基丁酸和丝氨酸水溶液体系在4个温度下的密度,以及葡萄糖、果糖、半乳糖、树胶醛糖和木糖水溶液体系在5个温度下的密度.此外采用所建立的方程,不引入任何可调参数,直接对氨基酸在尿素水溶液中的密度进行了预测.关联和预测的结果均令人满意. Based on the perturbation theory and the basic idea of ​​statistical association fluid theory, the equation of state for the density of amino acids and sugar solution was established. The effects of glycine, alanine, valine, aminobutyric acid and serine aqueous solution on the four temperature , And the densities of glucose, fructose, galactose, aldose and xylose aqueous solution at 5 temperature.Using the established equation, we can directly introduce amino acids in aqueous urea solution without introducing any adjustable parameters Density were predicted.Conclusion and prediction of the results are satisfactory.