This method describes the sample collection and analysis of methyl isocyanate. Samples are collected by drawing a known volume of air through XAD-7 tubes coated with 0.3 mg of 1-(2-pyridyl)piperazine (1-2PP). Samples are desorbed with acetonitrile (ACN) and analyzed by high performance liquid chromatography (HPLC) using a fluorescence or ultraviolet (UV) detector. The coated XAD-7 tubes should be stored under refrigeration before sampling.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least 18 days. |
| Preservatives: | Keep refrigerated at all times. Exposure to strong sunlight should be avoided. |
| Required Preps: | Solid sorbent tubes: XAD-7 coated with 0.3mg of 1-2PP [1-(2-pyridyl)piperazine]. |
| Collection Method: | Solid sorbent treated XAD-7 tubes: 15 L at 0.05 L/min. |
| Analytical Methodology: | HPLC/UV |
| Documentation: | 
054
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Methyl Isocyanate | C2H3NO |
624-83-9 |
0.07 |
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.