Chromatographic method for the determination of conditional equilibrium constants for the carbamate formation reaction from amino acids and peptides in aqueous solution
作者:Jian Ge Chen、Mats Sandberg、Stephen G. Weber
DOI:10.1021/ja00069a037
日期:1993.8
A novel and sensitive method has been developed and evaluated for the study of carbamate formation equilibria of amino acids and peptides in aqueous solution. The method is based on reversed-phase liquid chromatography with cetyltrimethylammonium bromide. The reliability of the method was established by comparing the results determined from the present study with the few data in the literature. The
已经开发并评估了一种新颖且灵敏的方法,用于研究水溶液中氨基酸和肽的氨基甲酸酯形成平衡。该方法基于使用十六烷基三甲基溴化铵的反相液相色谱法。该方法的可靠性是通过将本研究确定的结果与文献中的少数数据进行比较来确定的。显示氨基甲酸酯反应的弛豫速率比色谱分布弛豫速率(秒)快。结果,在CO 2 存在下胺溶质的保留时间增加。测定了 11 种 L-α-氨基酸和肽的氨基甲酸酯形成常数和氨基甲酸酯在生理 pH 值下的摩尔分数。未发现形成常数与铵 pKa 之间的相关性