| abstract |
PURPOSE:To obtain a compsn. for easy detection of protein by incorporating a specific acidic dye, solvent, water and, if desired, pH adjusting agent into said compsn. CONSTITUTION:The compsn. contg. the acidic dye, solvent, water and if desired, pH adjusting agent is brought into contact (by coating, spraying, dipping, etc.) with the stain desired to be inspected and the discrimination by coloration is made possible if protein exists. The acidic dye is designated by the dye name and dye number in cosmetic tar dye classification; for example, amaranth (red No.2), erythrosine (red No.3), etc. are used. The compounding ration thereof is made 0.05-10wt%, more preferably about 0.3-2wt%. For example, alcohol, glycol, etc. are used for the solvent in order to improve cold resistance and wettability and to permit the easy discrimination if fats co-exist. The compounding ratio thereof is made about <=99%, more preferably about 30-70wt%. The water is preferably demineralized ion and refined water. The pH adjusting agent is compounded with the compsn. when needed in order to improve the sensitivity and for example, acetic acid, lactic acid, etc. are used to adjust the pH to about 2-12, more preferably to about 3-7. |