Patent ID: 9513227
Filing Date: 2016-12-06
CPC Classification: G01N

Claim Text:
1. A method for quantitative determination of an oxidant in a sample using a redox reaction, the method comprising: adding one kind of reducing agent to a sample solution containing one or a plurality of kinds of oxidants having different lifetimes; producing an absorbance curve by measuring a time change in absorbance of the sample solution after the one kind of reducing agent is added to the sample solution; and performing the quantitative determination of the oxidant while identifying the oxidant in the sample solution based on the obtained absorbance curve, wherein the oxidant in the sample solution is identified by comparing the obtained absorbance curve with a separately-acquired standard approximate curve indicating a time change in absorbance of a known oxidant, the obtained absorbance curve is broken down into at least one kind of approximate curve by a curve approximate analysis to calculate a half-value width of each approximate curve and initial absorbance at a time of zero of each approximate curve, and the half-value width of each approximate curve is compared with a half-value width of a separately-acquired standard approximate curve of the known oxidant to identify an oxidant attributing to each approximate curve.