This method is for the determination of phosphine in workplace air samples. The sample is collected using casette containing a glass fiber filter and a mercuric chloride treated polyester filter. After collection the sample is digested with sulfuric acid and analyzed by ICP.
The treated filter has a shelf life of 3 months.
NOTE: This method supercedes Method ID-180.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | The recovery of phosphine was above 92% after 17 days when kept at ambient or refrigerated temperatures. |
| Preservatives: | None specified in the method. |
| Required Preps: | 37 mm glass fiber and mercuric chloride treated polyester filter (SKC 225-9018) |
| Collection Method: | The method recommends a 1.0 - 2.0 L/min. flow rate witha 30 - 240L sample collection volume. |
| Analytical Methodology: | ICP |
| Documentation: | 
1003
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Phosphine | H3P |
7803-51-2 |
9 |
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.