This method is used for the determination of beryllium, and compounds as beryllium. The sample is collected on cellulose ester membrane filters, ashed with nitric acid at 150 °C until fumes disappear, then at 400 °C until sulfuric acid fumes appear. The sample is then analyzed by graphite furnace atomic absorption. The working range is 0.5 to 10 mg/m³ for a 90L air sample. The method is applicable to ceiling measurements using a 25L air sample. Verify that the compounds in the sample are soluble with this ashing procedure. NOTE: This revises Method P&CAM 288, which replace Method S339. Flame AA and plasma emission (ICP-AES) are not sensitive enough for beryllium at these concentrations.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Stable |
| Preservatives: | Stable |
| Required Preps: | Cellulose ester membrane filter (0.8µm pore size). |
| Collection Method: | Filter: 25L - 1000L @ 1 to 4 L/min. |
| Analytical Methodology: | Graphite Furnace Atomic Absorption |
| Documentation: | 
7102
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Beryllium | Be |
7440-41-7 |
0.005 |
µg |
* 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.