Place a polyethylene filter funnel in one of the 20 mL glass vials
marked with the sample number
Position the black-capped test
tube directly over the top of the funnel and open the dispenser
nozzle (See Figure 3).
Dispense the solution by carefully squeezing
the sides of the tube. Stop as soon as the first drop of oil appears.
Allow the solution to pass through the funnel, but remove the funnel
before any oil can get through. Allow the solution to cool for five
minutes. The sample is now ready for analysis.