Izumoto S, Machida Y, Nishi H, Nakamura K, Nakai H, Sato T. Chromatography of crotamiton and its application to the determination of active ingredients in ointments.
J Pharm Biomed Anal 1997;
15:1457-66. [PMID:
9226576 DOI:
10.1016/s0731-7085(96)02052-3]
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Abstract
Crotamiton, which is a mixture of cis and trans isomers, was investigated by several separation techniques. One of the HPLC modes, in which crotamiton eluted as a single peak, was selected for the determination of five active ingredients (crotamiton, prednisolone, glycyrrhetinic acid, dibucaine and chlorhexidine hydrochloride) in an ointment. The simultaneous determination was performed using isocratic reversed-phase mode within 20 min by employing an octyl (C8) column and a mobile phase containing sodium dodecyl sulfate (SDS) and 2-propanol. The method was successfully applied to quality control and stability testing of the ointment.
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