This method is for the collection and analysis of adsorbable organic halides (AOX) from water and wastewater. The sample is analyzed by combustion and micro-coulometry. An aliquot of the sample is absorbed onto granular activated carbon, it's washed to remove inorganic halide, combusted to form the hydrogen halide and then titrated with a micro-coulometer. Sample results are reported as organic chloride. (Cl-).
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Analyze samples no less than three days and no more than six months from sample collection. |
| Preservatives: | Samples are adjusted to pH <2 with nitric acid and kept at 0 to 4°C until analysis. If residual chlorine is present, it is removed with sodium thiosulfate. |
| Required Preps: | 125mL amber glass bottle |
| Collection Method: | Grab sampling |
| Analytical Methodology: | Combustion/micro-coulometer |
| Documentation: | 
1650
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Absorbable Organic Halide (AOX) | AOX |
50 |
µg/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.