Patent ID: 8080423

Claim:
A method for stabilizing a kit of compositions comprising a first composition and a second composition used for the measurement of glycated hemoglobin or glycated albumin in a sample comprising: making a protease, 10-(carboxymethylaminocarbonyl)-3,7-bis(dimethylamino)phenothiazine, and a cyclodextrin coexist together in the absence of a sample containing glycated hemoglobin or glycated albumin, and thereby providing the first composition comprising the protease, 10-(carboxymethylaminocarbonyl)-3,7-bis(dimethylamino)phenothiazine, and the cyclodextrin with no sample containing glycated hemoglobin or glycated albumin, and providing the second composition containing an oxidase which oxidizes a glycated amino acid and/or a glycated peptide, wherein the first and second compositions of the kit remain stable in a liquid state for 6 months or longer under refrigeration in the absence of a sample containing glycated hemoglobin or glycated albumin.