Abstract: The invention relates to a method for analysis of liposoluble vitamins of biological materials. It is proposed to perform reagent storage, sample application and conducting of the measuring in one reaction vessel and to correct interfering ingredients during the photometric evaluation.

Abstract: The present invention relates to a method for the analysis of fat-soluble components, in particular dyes, from biological materials, in particular lipid rich foodstuffs, having an enrichment of the components and subsequent analysis. The method comprises a combination of extraction and separation steps and a subsequent analysis step. The invention further relates to an analytical kit and analytical equipment for carrying out the method. The method according to the invention is composed of a plurality of steps. The critical steps which are essential and characterize the invention are: 1. Pre-treatment of the sample to remove lipids. 2. Extracting the dyes into an extraction mixture by a specific solvent or solvent mixture. 3. Destruction of the oxidative sensible ingredients such as carotenoids prior to the final detection and quantification by eye or by optical enhancement.