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chemical oxygen demand [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-09-16

English

Subject field(s)
  • Environmental Studies and Analyses
  • Water Pollution
  • Analytical Chemistry
DEF

The mass concentration of oxygen equivalent to the amount of dichromate consumed by dissolved and suspended matter when a water sample is treated with that oxidant under defined conditions.

OBS

The weight of oxygen taken up by the total amount of organic matter in a sample of water without distinguishing between biodegradable and non-biodegradable organic matter. The result is expressed as the number of parts per million (or milligrams per litre, or grams per cubic metre) of oxygen taken up from a solution of boiling potassium dichromate in two hours. The test has been used for assessing the strength of sewage and trade wastes.

OBS

chemical oxygen demand; COD: term, abbreviation and definition standardized by ISO.

French

Domaine(s)
  • Études et analyses environnementales
  • Pollution de l'eau
  • Chimie analytique
DEF

Concentration en masse d'oxygène équivalente à la quantité de dichromate consommée par les matières dissoutes et en suspension lorsqu'on traite un échantillon d'eau avec cet oxydant dans des conditions définies.

OBS

Paramètre utilisé pour caractériser la pollution organique de l'eau, qui se mesure à partir de la quantité d'oxygène dissous nécessaire à la dégradation chimique des polluants organiques qu'elle contient.

OBS

demande chimique en oxygène; DCO : terme, abréviation et définition normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Estudios y análisis del medio ambiente
  • Contaminación del agua
  • Química analítica
DEF

Concentración en masa del oxígeno equivalente a la cantidad de dicromato consumido por las materias disueltas y en suspensión, cuando una muestra de agua se trata por dicho oxidante en condiciones definidas.

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