This method is for the determination of phthalic anhydride. The sample is collected using an open-face sampling device that contains two glass fiber filters coated with 10 mg of 3,4-dimethoxybenzylamine (veratrylamine). After collection the filters are extracted with 90:10 (v/v) acetonitrile/dimethyl sulfoxide and analyzed by HPLC using a UV detector.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | Recoveries of the analyte remained above 80% after 15 days of storage at ambient temperature (20-25°C) or refrigeration at 0°C. |
| Preservatives: | Keep refrigerated or at ambient temperature. |
| Required Preps: | Two 3,4-dimethoxybenzylamine coated 37mm glass fiber filters (SKC 225-7) |
| Collection Method: | The method recommends a flow rate of 1.0 L/min. with a collection volume of 75L. |
| Analytical Methodology: | HPLC/UV |
| Documentation: | 
090
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Phthalic anhydride | C8H4O3 |
85-44-9 |
2.34 |
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.