Abstract
SEVERAL spray reagents are available for the specific detection of ketoses and ketose-containing sugars on paper chromatograms. Probably the most widely used are resorcinol and naphthoresorcinol, originally prepared as sprays in 2 N hydrochloric acid by Forsyth1. Afterwards, Partridge2 replaced the hydrochloric acid with trichloracetic acid in order to minimize attack on the filter paper. Heyrovsky3 has recently reported that β-indolyl acetic acid in trichloracetic acid is also a very sensitive ketose-specific reagent. In work in this laboratory on two fructose-containing disaccharides it has been found that all three of the above reagents, when prepared in trichloracetic acid, failed completely to detect these sugars on paper chromatograms. When the trichloracetic acid was replaced with 2 N hydrochloric acid strong positive tests were obtained. The results are listed in Table 1.
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References
Forsyth, W. G. C., Nature, 161, 239 (1948).
Partridge, S. M., Biochem. J., 42, 238 (1948).
Heyrovsky, A., Biochim. Biophys. Acta, 21, 180 (1956).
Bailey, R. W., and Oxford, A. E. (unpublished).
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BAILEY, R. Acidity of Sprays used in detecting Ketohexoses on Paper Chromatograms. Nature 181, 836–837 (1958). https://doi.org/10.1038/181836b0
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DOI: https://doi.org/10.1038/181836b0
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