This method is for the determination of conductivity in surface waters, drinking water, and wastewater. The conductance of a standard KCl solution is measured and a cell constant is calculated. The sample is analyzed after the cell constant is determined. Conductivity, k, is a measure of the ability of an aqueous solution to carry an electric current. This ability depends on the presence of ions,their total concentration, mobility, and valence, and on the temperature of the measurement. Solutions of most inorganic compounds are relatively good conductors. Conversely, molecules of organic compounds that do not dissociate in aqueous solution conduct a current very poorly, if at all.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 28 days from sample collection to analysis. |
| Preservatives: | Cool samples to 6°C ± 2. |
| Required Preps: | 500 mL glass or polyethylene bottle with a Teflon lined lid. |
| Collection Method: | Grab sampling |
| Analytical Methodology: | Conductivity bridge |
| Documentation: | 
SM 2510B
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Conductivity | 1 |
uohms/cm | ||
* 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.