N,N′-二环己基-N-二十二碳酸酰脲解离常数测定

Determination of Dissociation Constant of N,N′-Dicyclohexyl-N-Docosanoyl Urea

目的:测定N,N′-二环己基-N-二十二碳酸酰脲解离常数。方法:采用紫外分光光度法及A-pH曲线法测定N,N′-二环己基-N-二十二碳酸酰脲解离常数。结果:紫外分光光度法测得N,N′-二环己基-N-二十二碳酸酰脲的pKa为7.16±0.24,A-pH曲线法求得pKa为6.98。

Objective： To determine the dissociation constant of N, N＇-dicyclohexyl-N-docosanoyl urea. Methods： The dissociation constant of N, N＇-dicyclohexyl-N-docosanoyl urea is detected by ultraviolet spectrophotometry（UV） and A -pH curves. Results： The dissociation constant of N, N＇-dicyclohexyl-N-docosanoyl urea is 7.16 ±0. 24 by UV and 6. 98 by A -pH curves.