ISO 5815-1:2003
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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Water quality — Determination of biochemical oxygen demand after n days (BODn) — Part 1: Dilution and seeding method with allylthiourea addition
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English, French
31-03-2003
09-04-2025
ISO 5815-1:2003 specifies a determination of the biochemical oxygen demand of waters by dilution and seeding with suppression of nitrification.
ISO 5815-1:2003 is applicable to all waters having biochemical oxygen demands greater than or equal to 3 mg/l of oxygen (the limit of determination) and not exceeding 6 000 mg/l of oxygen. For biochemical oxygen demands greater than 6 000 mg/l of oxygen, the method is still applicable, but the errors caused by the necessary dilutions can influence the analytical quality of the test method and the results are to be interpreted with circumspection.
The results obtained are the product of a combination of biochemical and chemical reactions. 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 inhibit biochemical oxidation. The presence of algae or nitrifying microorganisms can produce artificially high results.
Annex A describes alternative incubation periods.
Annex B describes multitesting, which can be used to obtain enhanced precision or to demonstrate the presence of substances toxic to microorganisms.
Annex C provides precision data.
| Committee |
ISO/TC 147/SC 2
|
| DevelopmentNote |
Together with ISO 5815-2, supersedes ISO 5815. (04/2003) DRAFT ISO/DIS 5815-1 is also available for this standard. (09/2017)
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| DocumentType |
Standard
|
| Pages |
15
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
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| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| EN 1899-1:1998 | Identical |
| DIN EN 1899-1:1998-05 | Identical |
A newer version of this standard is available.
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