Method | SPME and syringe (Supelco bulletin 922) | EPA 8270 | EPA 8275 | Sorption tube (EPA TO-15 and TO-17) |
Samples | LDPE | |||
Type of sorption tube | None | Tenax AG | ||
Volume of injection | N/A | 1.00 µL | N/A | |
Type of SPME Fiber | 100 μm polydimethylsiloxane | None | None | |
Type of syringe | None | (GASTIGHT) 500 µL | None | |
Solvents | None | deionised water, toluene and acetonitrile | None | |
Analytical instrument | GC-MS | Py-GC-MS | ||
Instrument type | Thermo Scientific Trace 1300 | PE Autosystem GC with built-in Autosampler | ||
Column | Thermo TG-SQC30 meter, 0.25 mm ID, 0.25 µm df | |||
Mass range | 41 - 650 amu | 35 - 650 amu | 41 - 650 amu | |
Scan time | 0.59 sec/scan | 0.94 sec/scan | 0.95 sec/scan | 0.59 sec/scan |
Carrier | He 1mL/min. | |||
Detector | MS | FID | ||
Injection method | Manual | Autosampler | ||
Injector | Splitless (closed 3 min.) | Split | Programmable split/splitless injector (PSSI) | |
Initial Setpoint | 220˚C | 280˚C | ||
Oven temperature | 35˚C (2 min.)/10.0˚∙ min−1/220˚C (2 min.)/30.0˚∙ min−1/300.0˚C (5 min.) | 40˚C (4 min.)/10.0˚∙min−1/270˚C (2 min.) | 40˚C (4 min.)/10.0˚∙min−1/320˚C (2 min.) | 50˚C (2 min.)/10.0˚∙min−1/230˚C (10 min.) |
Total run time | 25.00 min. | 29.00 min. | 34.00 min. | 30.00 min. |