Patent ID: 6774992
Filing Date: 2004-08-10
Classification: D21C,G01N

Abstract:
A method for measuring an amount of a peroxide or an amount of a peroxyl ion of a sample comprising the following steps:(a) irradiating at least a portion of the sample with a laser light for generating a Raman spectrum of the sample; (b) obtaining a Raman spectrum for obtaining at least two measurements at two different wavenumbers, a first measurement related to a Raman intensity related to an amount of a peroxide or an amount of a peroxyl ion, and a second measurement related to the other of an amount of a peroxide and an amount of a peroxyl ion; (c) formulating a relationship between a Raman intensity for a peroxide and a Raman intensity for a peroxyl ion by comparing information related to the two measurements for determining the amount of a peroxide or the amount of a peroxyl ion; and, (d) varying the amount of a peroxyl ion by varying a pH of the solution, wherein the relationship between the Raman intensity for a peroxide and the Raman intensity for a peroxyl ion is at least one of a product, a ratio, and a sum of the two measurements.