This method is for the determination of total mercury (organic and inorganic) in soils, sediments, bottom deposits, and sludge-type materials. The sample must be completely digested prior to analysis by cold-vapor atomic absorption (CVAA).
In this method mercury is reduced its elemental state and aerated from solution in a closed system. Mercury vapor passes through a cell positioned in the light path the atomic absorption spectrophotometer. Absorbance (peak height) is measured as a function of mercury concentration.
The typical instrument detection limit (IDL) for this method is 0.0002 mg/L.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 28 days from sample collection to analysis |
| Preservatives: | Store samples at ≤ 4°C. |
| Required Preps: | 4oz Glass bottle |
| Collection Method: | Grab sampling |
| Analytical Methodology: | CVAA |
| Documentation: | 
7471B
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Mercury | Hg |
7439-97-6 |
0.0002 |
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.