US PATENT SUBCLASS 436 / 62
OXYGEN DEMAND (E.G., BOD, TOD, COD, ETC.)


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

62OXYGEN DEMAND (E.G., BOD, TOD, COD, ETC.)


DEFINITION

Classification: 436/62

OXYGEN DEMAND (E.G., BOD, TOD, COD, ETC.):

(under the class definition) Subject matter wherein oxidizable matter in an aqueous sample is determined.

(1) Note. Three principle oxygen demand tests are Biological Oxygen demand (BOD), Chemical Oxygen demand (COD) and Total Oxygen demand (TOD). BOD = measure of organic matter in sample in terms of the amount of oxygen the sample will consume when organic matter is eliminated. COD = measure of the organic matter in a sample that is susceptible to oxidation by a strong chemical oxidant. TOD = amount of oxygen required when the combustible materials in a sample burn in the presence of an oxygen containing feed stream.

SEE OR SEARCH THIS CLASS, SUBCLASS:

133, for processes of carbon content determination which include a step of converting the carbon content of a sample to carbon dioxide.

146, for processes of determination of total organic carbon.

SEE OR SEARCH CLASS

600, Surgery,

529, for determination of metabolic rate by a method which measures the rate of oxygen consumption of a living body by means contacting or in a living body.