This method describes the sample collection and analysis of methylene chloride. Samples are collected by drawing a known volume of air through specially prepared sampling tubes that contain three 350-mg sections of coconut shell charcoal. Analysis of the samples is by GC/FID following desorption of the individual charcoal sections with carbon disulfide.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least 18 days. |
| Preservatives: | Store at room temperature. |
| Required Preps: | Solid sorbent sampling tube: three sections of 350mg coconut shell charcoal adsorbent in 13cm x 8mmOD x 6mm ID glass tubes. |
| Collection Method: | Solid sorbent tube: coconut shell charcoal: 10 L at 0.05 L/min. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
059
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Methylene chloride | CH2Cl2 |
75-09-2 |
0.99 |
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.