Standard(s): 

ASTM D 5006, JIS C2101

Product group(s): Fuel

User group(s): Antifreeze, Jet, Jet Fuel, Kerosene

Scope:

This test method describes a technique for measuring the concentration of Ethylene Glycol Monomethyl Ether (EGME) and Diethylene Glycol Monomethyl Ether (DiEGME) in aviation fuels. The HB and Brix scale refractometers are specified to determine the concentration of these fuel system icing inhibitors (FSII) by measuring the refractive index of a water extract.

Precision estimates have been determined for the EGME and DiEGME additives using specific extraction ratios with a wide variety of fuel types.

The extraction ratios are high enough that portable hand-held refractometers can be used, but not so high as to sacrifice accuracy or linearity, or both, in the 0.01 to 0.25 vol. % range of interest.