This method is for the determination of diborane by plasma emission spectrometry. The sample is collected on PTFE filters followed by impregnated charcoal sorbent tubes, desorbed in 10 mL 3% H2 O2 ; allowed to stand for 30 min and a 20 minute ultrasonic bath. The working range is 0.05 to 0.22 ppm (0.06 to 0.25 mg/m³) for a 120-L air sample. The measurement can also be done by inductively-coupled plasma atomic emission spectrometry (e.g., Method 7300). Note: This revises P&CAM 341.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least 7 days. |
| Preservatives: | Store at room temperature. |
| Required Preps: | PTFE filter, 1-µm pore size, 13-mm diameter; oxidizer-impregnated charcoal sorbent tube, 100mg/50mg, 7cm x 6mmOD x 4mmID. |
| Collection Method: | PTFE filter and solid sorbent tube: 60L - 260L @ 0.5 - 1L/min. |
| Analytical Methodology: | Plasma emission spectrometry. |
| Documentation: | 
6006
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Diborane(6) | H6B2 |
19287-45-7 |
1 |
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.