HT2800T_en_c.doc Page 150 of 275
The following parameters can be viewed/edited:
•
Pre-washing: enables/disables the pre-washing operation. The Fiber pre-washing is
performed after the extraction (before the desorption) by immersion inside a proper
solution (wash vial in position 7 of Figure 1);
•
Pre-Washing Time: sets the time of the pre-washing operation (see above)
•
Post-Cleaning: enables/disables the post-cleaning operation. The Fiber post-cleaning is
the Fiber cleaning after the desorption operation. The cleaning is performed in the
location specified as “Clean mode” in the Setup Configuration: Run (see paragraph
4.2.6.3).
•
Post-Cleaning Time: sets the time of the post-cleaning operation (see above).
Select “Exit” to exit from this screen and return to the “RUN: METHOD X” screen (see
paragraph 5.3.2 “Method X: Setting method parameters“).
5.3.2.4 Extraction parameters
Access sequence: RUN>SETTINGS>METHODS>METHOD X>EXTRACTION
The following parameters can be viewed/edited:
•
Extraction Time: time the Fiber is exposed inside the vial to absorbe the analytes;
•
Extraction Depth: the depth of the Fiber inside the vial during the extraction phase (see
tables below for setting the depth correctly);
•
Derivatization: see 11 “Appendix A – Glossary“. It can have the following values:
Pre
Derivatization before the extraction
Post
Derivatization after the extraction
None
No derivatization
•
Derivatization Time: time the Fiber is exposed to the derivatization agent;
•
Derivatization Depth: depth of the Fiber inside the vial during the derivatization (see
tables below for setting the depth correctly).
For Extraction Depth and Derivatization depth, the position “Under septum” (depth =0) is
between 5 and 7mm under vial septum. This spread depends on the vials height and the
mechanical tolerance of the oven loading.
Select “Exit” to exit from this screen and return to the “RUN: METHOD X” screen (see
paragraph 5.3.2 “Method X: Setting method parameters“).
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