This method describes the sample collection and analysis of divinylbenzene, ethylvinylbenzene, and styrene. Samples are collected by drawing air through glass sampling tubes containing coconut shell charcoal coated with 4-tert-butylcatechol. Samples are desorbed with toluene and analyzed by GC using a flame ionization detector. The procedure presented here successfully overcomes the low and non-linear desorption efficiency that styrene displayed at low sampler loadings when collected with coconut shell charcoal and desorbed with carbon disulfide. This procedure also improved the desorption efficiency for DVB.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Recovery remained above 75-91% after 17 days of storage at ambient temperature (22°C) or refrigeration at -20°C. |
| Preservatives: | Keep frozen or at ambient temperature. |
| Required Preps: | Samples are collected with glass sampling tubes (7cm x 6mm OD x 4mm ID) packed with two sections of coconut shell charcoal that has been coated with TBC, 10% by weight; 110mg/55mg. |
| Collection Method: | Solid sorbent sampling tubes; 12L @ 0.05L/min. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
089
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Styrene | C8H8 |
100-42-5 |
5.09 |
µg |
| Divinyl benzene | 1321-74-0 |
6.02 |
µg | |
| Ethylvinyl benzene | 28106-30-1 |
4.6 |
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.