Pyridylamino derivatization is suitable for the microanalysis of sugars, but there is a problem in that by-products of the labeling reaction and fluorescent substances from samples occasionally interfere with the detection of pyridylamino sugars. Especially, interference by them is serious in monosaccharide analysis. I have developed a convenient purification method for pyridylamino monosaccharides by the use of a spin column with boronate-conjugated resin.
