This method is for the collection and analysis of o-chlorobenzylidene malononitrile (OCBM) from workplace air. The sample is collected on a PTFE membrane filter followed by a Tenax sorbent tube. After collection the filter and sorbent are extracted with 20% methylene chloride in hexane and analyzed by HPLC using a UV detector.
The working range of the method is 0.147 - 0.810 mg/m3 using a 90L sample.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | None specified in the method. |
| Preservatives: | None specified in the method. |
| Required Preps: | 37mm PTFE filter with 1 micron pore sice, Tenax tube, 70/35mg |
| Collection Method: | The method recommends a 1.5 L/min. flow rate and a 90L sample collection volume. |
| Analytical Methodology: | HPLC/UV |
| Documentation: | 
P&CAM 304
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| o-Chlorobenzylidene malononitrile | C10H5ClN2 |
2698-41-1 |
0.3 |
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.