Introduction

The aviation industry has recently encountered the problem of DEF (diesel exhaust fluid) contamination in FSII (fuel system icing inhibitor). Therefore, a need exists to determine if FSII is free of DEF prior to addition of FSII to aviation fuel.

THIS IS NOT A FUEL TEST.

Scope

This test covers the detection of DEF in FSII in a range of 2-100 %.

Procedure

1. Using the supplied pipette, dispense approximately 2 mL of FSII sample into the supplied clear vial.

2. Empty the contents of the supplied reagent capsule (approximately 1⁄2 g) into the vial. Caution-it is important that you follow the order of step 1 and 2.

3. Place stopper lid on vial.

4. Shake vial vigorously for approximately 30 seconds. Contents should have a uniform consistency.

5. If an immediate blue color change is observed, this is a positive indicator of DEF contamination in the range of 10-100 %.

6. If there is no immediate blue color change, place vial on a level surface and allow to sit for approximately 5 minutes.

7. Observe the reagent settling reaction in the vial as follows:

Uniform white cloudy- indicative of no DEF contamination.
Clear sample on top portion of vial with slight blue color change-indicative of DEF contamination in the range of 2-10 %.

Significance and Use

The above procedure provides a rapid, visible test to ascertain significant DEF contamination (2- 100%) of FSII. DEF and FSII are both clear and appear similar to water. There is no other known test to determine if they have been mixed.

THIS IS NOT A FUEL TEST. IT IS NOT FEASIBLE TO TEST FOR DEF IN JET FUEL.