Patent ID: 8273577
Filing Date: 2012-09-25
Classification: C09B,G01N,Y10T

Abstract:
1. A method for detecting a phenothiazine-derivative color in a reaction system by measuring a light absorbance, comprising a step of detecting a phenothiazine-derivative color, wherein, in the detecting step, a phenothiazine-derivative color is detected in the presence of at least one color substance selected from the group consisting of a compound represented by Formula (K) below, a compound represented by Formula (II) below, and a flavonoid-based color: (in Formula (I), R R in R 1 and R 2 , X is hydrogen, a halogen, sodium or potassium, Y is hydrogen or SO 3 X, Xs may be the same or different, and Ys may be the same or different, and Z is hydrogen, a methyl group, or a methoxy group, and Zs may be the same or different); and (in Formula (II), X is hydrogen, a halogen, sodium, or potassium, and Xs may be the same or different, and Y is hydrogen, a halogen, sodium or potassium, and Ys may be the same or different) wherein the measuring a light absorbance in the detecting step is the long wavelength side compared with the maxiumu absorption wavelength from 590 to 670 nm; and wherein the method comprises a color-developer-adding step of adding a color-developer that produces a phenothiazine-derivative color through oxidation-reduction to the reaction system, and producing a phenothiazine-derivative color through oxidation-reduction between the color-developer and an oxidizing substance or reducing substance in the reaction system, wherein, in the step of detecting a phenothiazine-derivative color, a presence/absence or an amount of phenothiazine-derivative color produced is measured by measuring a light absorbance.