ASTM D5006-02
(Test Method)Standard Test Method for Measurement of Fuel System Icing Inhibitors (Ether Type) in Aviation Fuels
Standard Test Method for Measurement of Fuel System Icing Inhibitors (Ether Type) in Aviation Fuels
SCOPE
1.1 This test method covers a technique for measuring the concentration of Diethylene Glycol Monomethyl Ether (DiEGME) in aviation fuels. The HB and Brix scale refractometers are specified to determine the concentration of this fuel system icing inhibitor (FSII) by measuring the refractive index of a water extract. Precision estimates have been determined for the DiEGME additives using specific extraction ratios with a wide variety of fuel types. The extraction ratios are high enough that portable handheld 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.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
Designation: D 5006 – 02
Standard Test Method for
Measurement of Fuel System Icing Inhibitors (Ether Type) in
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Aviation Fuels
This standard is issued under the fixed designation D 5006; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.2 Acronyms:
3.2.1 DiEGME—Diethylene Glycol Monomethyl Ether
1.1 This test method covers a technique for measuring the
3.2.2 FSII—fuel system icing inhibitor
concentration of Diethylene Glycol Monomethyl Ether (Di-
EGME) in aviation fuels. The HB and Brix scale refractome-
4. Summary of Test Method
ters are specified to determine the concentration of this fuel
4.1 In order to determine the concentration of DiEGME in
system icing inhibitor (FSII) by measuring the refractive index
aviation fuel, a measured volume of fuel is extracted with a
of a water extract. Precision estimates have been determined
fixed ratio of water. The extraction procedure includes suffi-
for the DiEGME additives using specific extraction ratios with
cient agitation and contacting time to ensure that equilibrium
a wide variety of fuel types. The extraction ratios are high
distributions are attained. With the HB refractometer, several
enough that portable handheld refractometers can be used, but
drops of the water extract are placed on the prism face and the
not so high as to sacrifice accuracy or linearity, or both, in the
volume percent DiEGME is read directly from a custom
0.01 to 0.25 vol % range of interest.
graduated scale printed on the reticule. If the Brix refractome-
1.2 The values stated in SI units are to be regarded as the
ter is used, a temperature correction factor is first applied to the
standard.
reading, multiplied by 2 and divided by 100 to calculate
1.3 This standard does not purport to address all of the
volume percent DiEGME. (Warning—Diethylene glycol
safety concerns, if any, associated with its use. It is the
monomethyl ether (DiEGME), Slightly toxic material. This
responsibility of the user of this standard to establish appro-
material caused slight embryo-fetal toxicity (delayed develop-
priate safety and health practices and determine the applica-
ment) but no increase in birth defects in laboratory animals.
bility of regulatory limitations prior to use.
Consult the suppliers’ material safety data sheet.)
2. Referenced Documents
NOTE 1—Methanol is not detected because of the similarity of water/
2.1 ASTM Standards:
methanol refractive indices, and the presence of methanol in fuel
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containing other additives results in lower than true measurements.
E 1 Specification for ASTM Thermometers
E 29 Practice for Using Significant Digits in Test Data to
5. Significance and Use
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Determine Conformance with Specifications
5.1 DiEGME is miscible with water and can be readily
3. Terminology
extracted from the fuel by contact with water during shipping
and in storage. Methods are therefore needed to check the
3.1 Definitions of Terms Specific to This Standard:
additive content in the fuel to ensure proper additive concen-
3.1.1 Brix scale—a refractometer with a refractive index
tration in the aircraft.
scale calibrated to weight percent cane sugar (sucrose).
5.2 This test method is applicable to analyses performed in
3.1.2 HB—a refractometer that can be used in a temperature
the field or in a laboratory.
range from 18 to 35°C without incorporating a temperature
correction factor.
6. Apparatus
6.1 Refractometer—The HB temperature compensated, di-
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This test method is under the jurisdiction of ASTM Committee D02 on
rect reading refractometer and the 0 to 30 or 0 to 16 Brix have
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
been found satisfactory for use.
D02.J0 on Aviation Fuels.
Current edition approved June 10, 2002. Published September 2002. Originally
published as D 5006–89. Last previous edition D 5006–96 (2001).
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Annual Book of ASTM Standards, Vol 14.03.
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Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5006–02
6.2 Extraction Vessel—Any suitable vessel of at least 200 9.3.2 Allow the extraction vessel to sit undisturbed at
mL with provisions for isolating a small column of water ambient temperature for a period of at least 2 min to allow the
extract. Examples are separatory funnels, (glass or plastic), or water to settle to the bottom. (Warning—Fuel entrained in t
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