F-900 Instruction Manual 8/14/2017
1554 NE 3
rd
Ave, Camas, WA 98607, USA Phone: (360) 833-8835
78
www.felixinstruments.com
Method 3: Long-Term Monitoring with Filtration
The purpose of this method is to determine the effectiveness of the PolarCept filter 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 and how to realize i
f the “cleaning”
period should be extended.
Procedure:
1. Fill conditioning Chamber In with distilled water and clean the water using potassium
permanganate in an in-line column connected to the intake port of the F-900, until the
background signal is below 40ppb.
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.
Figure 25: Set-up for fruit chamber using (KMnO
4
) to scrub ethylene from the outside air.
Summary of Contents for F-900
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