Abstract: The invention relates to a method for analysing ingredients, in particular lipids and/or vitamins and biological material ingredients, to methods of using relevant organic solvents or organic solvent mixtures, and to a spectrophotometer for measuring biological material ingredients. It is proposed to treat the biological materials with at least one organic solvent which extracts the ingredients, to convert the bi ological materials to a solidified form during the extraction, with the result that a solidified sediment and a liquid organic phase as the supernatant are formed, and to examine the extracted ingredients in the supernatant.

Abstract: The invention relates to a method for analysis of fat-soluble components, in particular fat-soluble dyes, from biological materials, in particular foods and feeds, having facilitated extraction of the fat-soluble components from the biological materials with use of suitable dilution solutions and of the extractability using pertinent organic solvents or organic solvent mixtures and also an enrichment and separation method, with subsequent digital evaluation and documentation. It is proposed to treat the biological materials first with a dilution medium which makes the fat-soluble components more readily extractable from the complex biological matrix and subsequently with at least one organic solvent which extracts the components; the substances extracted into the organic supernatant are subsequently chromatographically enriched and separated and then visually assessed and/or measured.

Abstract: The invention relates to a method for analysing ingredients, in particular lipids and/or vitamins and biological materials with a concentration of the biological material ingredients, to uses of relevant organic solvents or organic solvent mixtures, and to a spectrophotometer for measuring biological material ingredients. It is proposed to treat the biological materials with at least one organic solvent which extracts the ingredients, to convert the biological materials to a solidified form during the extraction, with the result that a solidified sediment and a liquid organic phase as the supernatant are formed, and to examine the extracted ingredients in the supernatant.