ASTM D3701-99a

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Designation: D 3701 – 99a An American National Standard
Designation: 338/98
Standard Test Method for
Hydrogen Content of Aviation Turbine Fuels by Low
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Resolution Nuclear Magnetic Resonance Spectrometry
This standard is issued under the fixed designation D 3701; 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 the hydrogen content (percent mass basis) in the sample.
1.1 This test method covers the determination of the hydro-
4. Significance and Use
gen content of aviation turbine fuels.
4.1 The combustion quality of aviation turbine fuel has
1.2 Use Test Method D 4808 for the determination of
traditionally been controlled in specifications by such tests as
hydrogen in other petroleum liquids.
smoke point (see Test Method D 1322), smoke volatility index,
1.3 The values stated in SI units are to be regarded as
aromatic content of luminometer number (see Test Method D
standard. The preferred units are mass percent hydrogen.
1740). Evidence is accumulating that a better control of the
1.4 This standard does not purport to address all of the
quality may be obtained by limiting the minimum hydrogen
safety concerns, if any, associated with its use. It is the
content of the fuel.
responsibility of the user of this standard to establish appro-
4.2 Existing methods allow the hydrogen content to be
priate safety and health practices and determine the applica-
calculated from other parameters or determined by combustion
bility of regulatory limitations prior to use. For a specific
techniques. The method specified provides a quick, simple, and
precautionary statement, see 6.1.
more precise alternative to these methods.
2. Referenced Documents
5. Apparatus
2.1 ASTM Standards:
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5.1 Nuclear Magnetic Resonance Spectrometer —A low-
D 1322 Test Method for Smoke Point of Kerosine and
2 resolution continuous-wave instrument capable of measuring a
Aviation Turbine Fuel
nuclear magnetic resonance of hydrogen atoms, and fitted with:
D 1740 Test Method for Luminometer Numbers of Avia-
2 5.1.1 Excitation and Detection Coil, of suitable dimensions
tion Turbine Fuels
to contain the test cell.
D 4057 Practice for Manual Sampling of Petroleum and
3 5.1.2 Electronic Unit, to control and monitor the magnet and
Petroleum Products
coil and containing:
D 4808 Test Method for Hydrogen Content of Light Distil-
5.1.2.1 Circuits, to control and adjust the radio frequency
lates, Middle Distillates, Gas Oils, and Residua by Low-
3 level and audio frequency gain.
Resolution Nuclear Magnetic Resonance Spectroscopy
5.1.2.2 Integrating Counter, with variable time period in
3. Summary of Test Method seconds.
5.2 Conditioning Block—A block of aluminum alloy drilled
3.1 A sample of the material is compared in a continuous
with holes of sufficient size to accommodate the test cells with
wave, low-resolution, nuclear magnetic resonance spectrom-
the mean height of the sample being at least 20 mm below the
eter with a reference standard sample of a pure hydrocarbon.
The results from the integrator on the instrument are used as a
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means of comparing the theoretical hydrogen content of the
This method has been written around the Newport Analyzer Mark IIIF (Oxford
standard with that of the sample, the result being expressed as Analytical Instruments, Ltd., Oxford, England) and the details of the method should
be read in conjunction with the manufacturer’s handbook.
This particular instrument was the only instrument available when the precision
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This test method is under the jurisdiction of ASTM Committee D-2 on program was carried out. Any similar instrument would be accepted into the above
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee method provided the new instrument was adequately correlated and proved to be
D02.03 on Elemental Analysis. statistically similar.
Current edition approved Nov. 10, 1999. Published January 2000. Originally The Newport Analyzer Mark IIIF is no longer in production and is being replaced
published as D 3701 – 78. Last previous edition D 3701 – 99. by the manufacturer with the Newport 4000. The Newport 4000 model instrument
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Annual Book of ASTM Standards, Vol 05.01. has been demonstrated to provide equivalent results to those obtained with the Mark
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Annual Book of ASTM Standards, Vol 05.02. III models which were used to generate the precision data.
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