This method is used for the determination of zinc and compounds as zinc. The sample is collected on cellulose ester membrane filters, ashed in concentrated nitric acid @ 140 °C, and then analyzed by flame atomic absorption. The working range is 1 to 10 mg/m³ for a 10 L air sample. This is an elemental analysis, not compound specific. Aliquots of samples can be analyzed separately for many additional metals. NOTE: This method is a revision and replacement of P&CAM 173 for zinc. Method 7300, plasma emission ( ICP-AES) is an alternate analytical technique. M7502 (x-ray diffraction) is specific for zinc oxide.
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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: 2L - 400L @ 1 to 3 L/min. |
| Analytical Methodology: | Flame Atomic Absorption. |
| Documentation: | 
7030
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Zinc oxide | ZnO |
1314-13-2 |
3 |
µg |
| Zinc | Zn |
7440-66-6 |
3 |
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.