Organic pollutant monitor
AssigneeWelsh Water Enterprises Limited
InventorsBoghos A. Manook, Philip G. Morgan
Life of this patent
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Abstract
An ultra-violet absorbence-based monitor for on-line monitoring of organic pollution in water at on-site locations measure the reduction in UV light passed through a sample and also makes measurements to provide indications of the amounts of visible light absorbed by, and scattered by, the samples respectively. The amount of organic matter is determined from the measured reduction in UV light by a calculation in which the results of the other measurements are used for compensation purposes. The sampling apparatus comprises a buoyant sampling head with an inlet port submerged beneath the water surface.
Claims30
A method of determining the amount of organic matter in a liquid sample comprising the steps of:
- (a) passing light of a wavelength in the UV region through the sample and sensing the emergent UV light intensity;
- (b) making a measurement to provide an indication of the absorption by the sample of visible light;
- (c) making a further measurement to provide an indication of the amount of scatter of light caused by the sample;
- and,
- (d) determining the amount of organic matter in the sample from the measured reduction in UV light intensity by a calculation in which the results from steps (b) and (c) are used for compensation purposes.
Apparatus for determining the amount of organic matter in a liquid sample, the apparatus comprising first means for passing light of a wavelength in the UV region through the liquid sample and sensing the emergent UV light intensity, second means for making a measurement to provide an indication of the absorption by the sample of visible light, and third means for making a further measurement to provide an indication of the amount of scatter if light caused by the sample including means for measuring one or more additional variables.
Apparatus for determining the amount of organic matter in a liquid sample, the apparatus comprising first means for passing light of a wavelength in the UV region through the liquid sample and sensing the emergent UV light intensity, second means for making a measurement to provide an indication of the absorption by the sample of visible light, and third means for making a further measurement to provide an indication of the amount of scatter of light caused by the sample.
Dependencies are inferred from the claim text.