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Agency: EPA·OSHA·NIOSH·Others Matrix: Air·Water·Solids·Bulk·Dust·Swab Analytical Guide |
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Method 410.4 Water
The Determination of Chemical Oxygen Demand (COD) by Semi-Automated Colorimetry
This method covers the determination of chemical oxygen demand (COD) in ground and surface waters, domestic and industrial wastes. The applicable range of the automated method is 3-900 mg/L and the range of the manual method is 20 to 900 mg/L.
(EPA: Office of Water)
| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Samples should be analyzed as soon as possible after collection. If storage is required, preserved samples maintained at 4°C may be held for up to 28 days. |
| Preservatives: | Samples must be preserved with sulfuric acid to a pH <2 and cooled to 4°C at the time of collection. |
| Required Preps: | None |
| Collection Method: | Grab sampling |
| Analytical Methodology: | Spectrophotometer or Technicon Analyzer |
| Documentation: |
410.4
|
Analyte |
Formula |
CAS Number |
Detection Limit |
|
|---|---|---|---|---|
| Chemical Oxygen Demand | 900 |
mg/L | ||
* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.
