This method is for the determination of diphenyl (biphenyl). The sample is collected on Tenax sorbent tubes, desorbed in carbon tetrachloride, and analyzed by GC/FID. The working range is 0.02 to 0.63 ppm (0.13 to 4 mg/m³) for a 30 L air sample. Measurement of concentrations down to 0.01mg/m³ may be possible if the desorption efficiency from the Tenax sorbent tube remains adequate. NOTE: This method revises Method S24.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 7 days from sampling to analysis if kept at room temperature |
| Preservatives: | Store at 25°C. |
| Required Preps: | Solid sorbent tube: Tenax GC, 20 mg/10 mg, 6cm x 6mm OD x 4mm ID |
| Collection Method: | Solid sorbent tube: 15 - 30 L @ 0.01 - 0.5 L/min. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
2530
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Biphenyl | C12H10 |
92-52-4 |
0.09 |
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.