F-900 Instruction Manual rev. 1/16/2014
1554 NE 3
rd
Ave, Camas, WA 98607, USA Phone (360) 833-8835 Fax (360) 833-1914
[email protected] http://www.felixinstruments.com
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1.
Fill Conditioning Chamber_Inbound (B) with distilled water and
clean the water using a sodium permanganate tube connected to the
inlet of the F-900, until the background signal is below 20ppb.
2.
Load the sample specimen into the fruit chamber.
3.
Start measuring the fruit headspace with the F-900.
4.
After sampling the headspace for exactly 5 minutes, take a syringe
sample and run it in the GC (gas chromatograph). Record result in
spreadsheet program, such as Microsoft Excel.
5.
Vent the fruit chamber, record the result in Excel and start method 3.
Method 3: Long-Term Monitoring with Filtration
The purpose of this method is to determine the effeteness of the interfering gas trap for long term
measurements. This will require the trap to self-regenerate between consecutive measurements.
The regeneration time is defaulted to 6 minutes; however for some species a greater time may be
needed. By keeping the default value for avocados we can better compare results and will
demonstrate the weakness of the method.
Procedure:
1.
Fill Conditioning Chamber_In (B) with distilled water and clean the
water using a sodium permanganate tube connected to the inlet of
the F-900, until the background signal is below 20ppb.
2.
Verify that Chamber In is set to “special” with a sufficient cleaning
period for the produce being monitored.
3.
Load the sample specimen into the fruit chamber.
4.
Start measuring the fruit headspace with the F-900.
5.
Allow the system to run for 5 measurement and cleaning cycles.
6.
Vent the chamber and load the data file to a computer.
7.
Switch to the next replicate and begin at method 1 again.
