2.3. Procedure
For the tests described here, the measurement procedure is the following: 8 ml of the sample to be measured is pipetted into a 22 ml vial, the vial is then closed with a septum and heated at 35°C in the water bath. After an equilibration time, defined as the time necessary for the volatile substances of the solution reach equilibrium with the headspace, the SPME-fiber is inserted in a vial for the sampling process. After the sampling time (extraction time in the terminology of SPME), the SPME-fiber is immediately transferred to the apparatus, thermally desorbed and the volatiles are drained to the detector by the helium flow.
2.3. ProcedureFor the tests described here, the measurement procedure is the following: 8 ml of the sample to be measured is pipetted into a 22 ml vial, the vial is then closed with a septum and heated at 35°C in the water bath. After an equilibration time, defined as the time necessary for the volatile substances of the solution reach equilibrium with the headspace, the SPME-fiber is inserted in a vial for the sampling process. After the sampling time (extraction time in the terminology of SPME), the SPME-fiber is immediately transferred to the apparatus, thermally desorbed and the volatiles are drained to the detector by the helium flow.
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