IP 277 : 72(R1995)
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
DETERMINATION OF ICING INHIBITOR IN AVIATION TURBINE FUELS
23-07-2013
12-01-2013
Four methods are described for the determination of icing inhibitor in aviation turbine fuels within the range of 0.02 to 0.2% v/v. The methods are equally applicable to additives consisting wholly of ethylene glycol monomethyl ether (methyl cellosolve, 2-methoxy ethanol) or this material containing 0.4% glycerol. In Method A the icing inhibitor is determined directly by infrared spectroscopy. In the remaining three methods the determination is carried out on an aqueous extract of the fuel. Method B employs a gas chromatographic finish, while Methods C and D depend on oxidation of the inhibitor with potassium dichromate/sulphuric acid. Excess dichromate is determined iodometrically in Method C and colorimetrically in Method D - using a comparator disk. Method D is suitable for rapid field test
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