The present study confirms that N,N‐dimethylformamide for the extraction of chloroplast pigments from vegetable tissues shows no differences from the usual acetone or methanol. Therefore, it can be applied to fats, as it allows separation of lipids and pigments by means of phase distribution between light petroleum ether and N,N‐dimethylformamide. The ether phase retains the decolored fatty matter, and the pigments dissolved in N,N‐dimethylformamide can be recovered totally unaltered. This method has been applied to oleoresins and oils from different products and origins. Satisfactory results have been obtained in terms of the degree of decoloration and the percentage of oil recovered. At the same time, the unaltered pigment concentrate obtained from the hypophase could be used as a color enhancer in the chemico‐pharmaceutical industry.
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Mínguez‐Mosquera et al. (1991) studied this question.
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