This method describes the sample collection and analysis of dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), di-2-ethylhexyl phthalate (DEHP), and di-n-octyl phthalate (DNOP). Samples are collected by drawing known volumes of air through OVS-Tenax sampling tubes. Samples are desorbed with toluene and analyzed by GC using a flame ionization detector (FID).
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | A 15 day storage test from sampling to analysis showed recoveries of DMP, DEP, DBP, DEHP and DNOP greater than 93%. |
| Preservatives: | Store at room temperature. |
| Required Preps: | OVS-Tenax sampling tube: The tube contains a glass fiber filter and two sections of Tenax adsorbent separated by a foam plug. |
| Collection Method: | OVS-Tenax sampling tube: 240 L at 1.0 L/min. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
104
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| bis-(2-Ethylhexyl)phthalate | C24H38O4 |
117-81-7 |
3.9 |
µg |
| Di-n-octyl phthalate | C24H38O4 |
117-84-0 |
3.3 |
µg |
| Dimethylphthalate | C10H10O4 |
131-11-3 |
6.5 |
µg |
| Diethylphthalate | C12H14O4 |
84-66-2 |
4.8 |
µg |
| Di-n-butylphthalate | C16H22O4 |
84-74-2 |
2.4 |
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.