By comparison of the absorption spectra in the visible light of the products of factories A and B, the authors show the existence of a qualitative difference in colour. The colouring substances, isolated from sugar factory products by a macro- reticular non functional resin, are submitted to chromatographic analysis on d’extran gel. Thus different chromatographic behaviours are pointed out, which reflect the diversity between the molecular weights of the colouring substances from the factories A and B. The colouring substances, extracted from the thick juices by a decolorizing resin, are also compared.
From the spectral point of view, the absorption curves have identical shapes but different gradients. As concerns the chromatographic behaviour on dextran gel and1 on porous grass mlcropearls, there exist significant differences between the colouring substances from A and B. The authors set up two hypothesis, the first to explain the higher content of colouring substances in the products from factory A, the other to explain the qualitative differences in colour.
Proceedings: CITS 1971
pdf download: CITS1971-575-597.pdf