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After a description of the technique of high performance liquid chromatography, the example of the analysis of various cochineals, the American cochineal (Dactylopius coccus), the Polish cochineal (Porphyrophora polonica), and the Armenian cochineal (Porphyrophora hamelii) is presented. With quantitative results concerning a dye present in a textile or a lake made from a unique natural source, it is possible to recognize mixtures from various sources. Even if it has been conceived for and most of the time applied to the analysis of dyes on textiles, the methodology may be also applied to paintings and miniatures (laquers). Some examples of application are also given.

L’analyse de colorants organiques naturels par chromatographie liquide haute performance et traitement des données par ordinateur