Patent ID: 9594015
Date: 2017-03-14
CPC Classifications: C02F,G01N

Claim:
1. A method for determining a radical scavenging potential of a water by determining a degradation of at least one reference substance in the water as a result of irradiation with ultraviolet (UV) light from a UV irradiation device, said method comprising the following steps: (1) adding at least one reference substance to a water sample and then mixing the water sample, (2) irradiating a first portion of the mixture obtained in step (1) with UV light from the UV irradiation device of at least one first wavelength in the range of 100 to 350 nm in an irradiation cell, the first wavelength operative to at least partially degrade the least one reference substance, (3) measuring an absorption of a quantity of the irradiated mixture obtained in step (2) in a measurement cell using light of at least second one wavelength in a range of 300 nm to 700 nm, (4) measuring the absorption of a second portion of the mixture obtained in step (1), which portion has not been irradiated by the UV light from the UV irradiation device in step (2), in a comparison measurement cell using light of the same wavelength as in step (3) as a reference measurement, and (5) determining the degradation of the reference substance caused by step (2) from a difference between the measured values obtained in steps (3) and (4).