ASTM D3701-01(2006)
(Test Method)Standard Test Method for Hydrogen Content of Aviation Turbine Fuels by Low Resolution Nuclear Magnetic Resonance Spectrometry
Standard Test Method for Hydrogen Content of Aviation Turbine Fuels by Low Resolution Nuclear Magnetic Resonance Spectrometry
SIGNIFICANCE AND USE
The combustion quality of aviation turbine fuel has traditionally been controlled in specifications by such tests as smoke point (see Test Method D 1322), smoke volatility index, aromatic content of luminometer number (see Test Method D 1740). Evidence is accumulating that a better control of the quality may be obtained by limiting the minimum hydrogen content of the fuel.
Existing methods allow the hydrogen content to be calculated from other parameters or determined by combustion techniques. The method specified provides a quick, simple, and more precise alternative to these methods.
SCOPE
1.1 This test method covers the determination of the hydrogen content of aviation turbine fuels.
1.2 Use Test Methods D 4808 for the determination of hydrogen in other petroleum liquids.
1.3 The values stated in SI units are to be regarded as standard. The preferred units are mass percent hydrogen.
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. For a specific precautionary statement, see .
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3701–01 (Reapproved 2006)
Designation: 338/98
Standard Test Method for
Hydrogen Content of Aviation Turbine Fuels by Low
1
Resolution Nuclear Magnetic Resonance Spectrometry
This standard is issued under the fixed designation D3701; 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 (´) 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* D1740 Test Method for Luminometer Numbers ofAviation
3
Turbine Fuels
1.1 This test method covers the determination of the hydro-
D4057 Practice for Manual Sampling of Petroleum and
gen content of aviation turbine fuels.
Petroleum Products
1.2 Use Test Methods D4808 for the determination of
D4808 Test Methods for Hydrogen Content of Light Distil-
hydrogen in other petroleum liquids.
lates, Middle Distillates, Gas Oils, and Residua by Low-
1.3 The values stated in SI units are to be regarded as
Resolution Nuclear Magnetic Resonance Spectroscopy
standard. The preferred units are mass percent hydrogen.
1.4 This standard does not purport to address all of the
3. Summary of Test Method
safety concerns, if any, associated with its use. It is the
3.1 A sample of the material is compared in a continuous
responsibility of the user of this standard to establish appro-
wave, low-resolution, nuclear magnetic resonance spectrom-
priate safety and health practices and determine the applica-
eter with a reference standard sample of a pure hydrocarbon.
bility of regulatory limitations prior to use. For a specific
The results from the integrator on the instrument are used as a
precautionary statement, see 6.1.
means of comparing the theoretical hydrogen content of the
2. Referenced Documents standard with that of the sample, the result being expressed as
2
the hydrogen content (percent mass basis) in the sample.
2.1 ASTM Standards:
D1322 Test Method for Smoke Point of Kerosine and
4. Significance and Use
Aviation Turbine Fuel
4.1 The combustion quality of aviation turbine fuel has
traditionally been controlled in specifications by such tests as
1
smoke point (see Test Method D1322), smoke volatility index,
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
aromatic content of luminometer number (see Test Method
D02.03 on Elemental Analysis.
D1740). Evidence is accumulating that a better control of the
Current edition approved May 1, 2006. Published June 2006. Originally
quality may be obtained by limiting the minimum hydrogen
approved in 1978. Last previous edition approved in 2001 as D3701 – 01. DOI:
10.1520/D3701-01R06. content of the fuel.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Withdrawn. The last approved version of this historical standard is referenced
the ASTM website. on www.astm.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3701–01 (2006)
4.2 Existing methods allow the hydrogen content to be
calculated from other parameters or determined by combustion
techniques.Themethodspecifiedprovidesaquick,simple,and
more precise alternative to these methods.
5. Apparatus
4
5.1 Nuclear Magnetic Resonance Spectrometer —A low-
resolution continuous-wave instrument capable of measuring a
nuclearmagneticresonanceofhydrogenatoms,andfittedwith:
5.1.1 Excitation and Detection Coil, of suitable dimensions
to contain the test cell.
5.1.2 Electronic Unit,tocontrolandmonitorthemagnetand
coil and containing:
5.1.2.1 Circuits, to control and adjust the radio frequency
level and audio frequency gain.
5.1.2.2 Integrating Counter, with variable time period in
seconds.
5.2 Conditioning Block—Ablock of aluminum alloy drilled
with holes of sufficient size to accommodate the test cells with
the mean height of the sample being at least 20 mm below the
top of the conditioning block (see Fig. 1).
5.3 Test Cells—Nessler-type tubes of approximately
100-mL capacity with a nominal external diameter of 34 mm
and a nominal internal diameter of 31 mm marked at a distance
NOTE—All dimensions are nominal values in millimetres, unless the
ofapproximately51mmabovethebottomofthetubebyaring
tolerance limit is specified.
around the circumference. The variation between the internal
FIG. 1 Hydrogen
...
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