Over deze norm
Specifies a method for the empirical and conventional determination of the bichemical oxygen demand of waters of undiluted samples. This standard is applicable to all waters having biochemical oxygen demands greater than or equal to 0,5 mg/l of oxygen demand and not exceeding 6 mg/l of oxygen. The detection limit will depend on the laboratory. If results are reported with a lower detection limit, the laboratory needs to produce data to verify that detection limit. The results obtained are the product of a combination of biochemical and chemical actions. They do not have the rigorous and unambiguous character of those resulting from, for example, a single, well-defined, chemical process. Nevertheless, they provide an indication from which the quality of waters can be estimated. The test can be influenced by the presence of various substances. Those which are toxic to microorganisms, for example bactericides, toxic metals or free chlorine, will inhabit biochemical oxidation. The presence of algae or nitrifying microorganisms can produce high results.In these situations a modification of the method or the BODn method is more appropriate.
|Nederlandse titel||Water - Bepaling van het biochemisch zuurstofverbruik na n dagen (BODn) - Deel 2: Methode voor onverdunde monsters|
|Engelse titel||Water analysis - Determination of biochemical oxygen demand after n days (BODn) - Part 2: Method vor undiluted samples|