. Carotin; the principal natural yellow pigment of milk fat; chemical and physiological relations of pigments of milk fat to the carotin and xanthophylls of green plants. Milk. CAROTIN, THE PRINCIPAL YELLOW PIGMENT OF MILK FAT 345 is added adsorption material only sufficient to destroy the fluorescence, both the carotin and xanthophylls remain in solution," and can be separated by means of a differentiation between the petroleum ether and eighty per cent alcohol, or, "By treating the solution with more adsorption material, after pouring it away from the first, and the xanthophylls th
. Carotin; the principal natural yellow pigment of milk fat; chemical and physiological relations of pigments of milk fat to the carotin and xanthophylls of green plants. Milk. CAROTIN, THE PRINCIPAL YELLOW PIGMENT OF MILK FAT 345 is added adsorption material only sufficient to destroy the fluorescence, both the carotin and xanthophylls remain in solution," and can be separated by means of a differentiation between the petroleum ether and eighty per cent alcohol, or, "By treating the solution with more adsorption material, after pouring it away from the first, and the xanthophylls then freed from combination with the adsorption material by means of alcoholic petroleum ; In addition to the above, Tswett made the interesting discovery that the pigments which are adsorbed by the various materials suggested, can to a certain extent displace one another in the adsorbing material. As an example one finds that, "If a petroleum ether solution of the mixed pigments is filtered through a column of adsorption material (such as CaCOs packed tight in a glass tube) the pigments will be separated from one another from top to bottom in differently colored zones, proportion- ately to their degree of ; This separation will be complete if a stream of pure solvent is put through the column after the pigment has been adsorbed in the upper part of the column. As stated by Tswett, "Like the rays of light in the spectrum, so the different components of a pigment mixture are actually separated in the CaCOg column, and may thus be qualitatively ; Tswett calls such an experiment a "; He found carbon bisulphide to be one of the most useful solvents for a chromoto- graphic analysis, on account of the bril- liant color which all pigments show in this solvent. In describing the technique for the chromotographic analysis, the author mentions the following essential points. A very finely divided material with not
Size: 1278px × 1955px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmilk, bookyear1914
