This method is used for the determination of lead. The sample is collected on cellulose ester membrane filters, ashed with concentrated nitric acid, followed by 30% hydrogen peroxide at 140 °C, and then analyzed by graphite furnace atomic absorption spectrophotometer. The working range is 0.002 to >1mg/m³. If high concentrations are expected, the sample should be analyzed by flame atomic absorption spectrophotometry. The method is applicable to elemental lead, including lead fume, and all other aerosols containing lead. This is an elemental analysis, not compound specific. Aliquots of the sample may be analyzed separately for additional elements. NOTE: This revises and replaces P&CAM 214. M7300 (ICP-AES) is an alternate analytical method. M7505 is specific for lead sulfide by x-ray diffraction. M7082 is a FAAS method, with a higher working range.
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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: 1L - 1500L @ 1 to 4 L/min. |
| Analytical Methodology: | Graphite Furnace Atomic Absorption Spectrophotometer |
| Documentation: | 
7105
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Lead monoxide | OPb |
1317-36-8 |
0.02 |
µg |
| Lead | Pb |
7439-92-1 |
0.02 |
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.