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Hydrobiological Journal
SJR: 0.217 SNIP: 0.575 CiteScore™: 0.24

ISSN Imprimir: 0018-8166
ISSN En Línea: 1943-5991

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Hydrobiological Journal

DOI: 10.1615/HydrobJ.v37.i2.90
8 pages

Accelerated Method for the Determination of Chemical Oxygen Demand in the Natural Waters

V. V. Udovichenko
T. Shevchenko National University Kiev, Ukraine Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
V. I. Nabivanets
Taras Shevchenko National University Kiev, Ukraine
V. V. Sukhin
Taras Shevchenko National University Kiev, Ukraine


The problems related to the desirable accelerated determination of chemical oxygen demand (COD) by organic matter in waters are considered. Based on the research conducted, the method is proposed that is simple in performance and accelerates determination procedure. The use of mercury salts is not needed if the concentration of chloride ions does not exceed 250 mg/L. The analyses of natural waters have shown a good reproducibility of the results obtained, and revealed practically no differences as compared to the values resulting from the standard method. It is not recommended to concentrate the water samples by evaporating or freezing.

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