Gatti et al. A — isomers are different, AcerView 34TL separation and quantification of all analytes in a single run in short time is difficult. In order to analyse the retinoic acid isomers, solid-phase extraction SPE was found to be necessary to eliminate the components with long retention times such as vitamin E acetate, vitamin A palmitate and b-carotene. Monitors Database File Two LC runs proved to be necessary for reliable quality control of these galenicals. In recent years, several[…]