采用18-冠-6测定药物制剂中的钾：萃取研究
Determination of potassium in pharmaceutical formulations by means of 18-crown-6: extraction studies.
作者信息
Raggi M A, Nobile L, Ramini M, Perboni I
机构信息
Department of Pharmaceutical Sciences, University of Bologna, Italy.
出版信息
J Pharm Biomed Anal. 1989;7(12):1545-50. doi: 10.1016/0731-7085(89)80163-3.
PMID:2490541
Abstract
A colorimetric method has been developed for the determination of potassium in pharmaceutical formulations. The method is based on the formation of a complex of potassium with 18-crown-6, followed by conversion to an ion-pair with picrate anion; the ion-pair is extracted with either methylene chloride or toluene-methylene chloride (80:20, v/v) and determined colorimetrically.
摘要
已开发出一种比色法用于测定药物制剂中的钾。该方法基于钾与18-冠-6形成络合物，随后与苦味酸根阴离子转化为离子对；离子对用二氯甲烷或甲苯 - 二氯甲烷（80:20，v/v）萃取，并用比色法测定。
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