Standard Test Method for Hydrogen Content of Middle Distillate Petroleum Products by Low-Resolution Pulsed Nuclear Magnetic Resonance Spectroscopy

SIGNIFICANCE AND USE
5.1 Hydrogen content represents a fundamental quality of a petroleum distillate that has been correlated with many of the performance characteristics of that product. Combustion properties of gas turbine fuels are related primarily to hydrogen content. As hydrogen content of these fuels decreases, soot deposits, exhaust smoke, and thermal radiation increase. Soot deposits and thermal radiation can increase to the point that combustor liner burnout will occur. Hydrogen content is a procurement requirement of the following military fuels: JP-5 specified in MIL-DTL-5624, JP-8 specified in MIL-DTL-83133, and Naval Distillate Fuel specified in MIL-DTL-16884.  
5.2 This test method provides a simple and precise alternative to existing test methods (D3701, D4808, and D5291) for determining the hydrogen content of petroleum distillate products.
SCOPE
1.1 This test method covers the determination of the hydrogen content of middle distillate petroleum products using a low-resolution pulsed nuclear magnetic resonance (NMR) spectrometer. The boiling range of distillates covered by the test method is 150 °C to 390 °C. While this test method may be applicable to middle distillates outside this boiling range, in such cases the precision statements may not apply. The test method is generally based on Test Methods D3701 and D4808, with a major difference being the use of a pulsed NMR spectrometer instead of a continuous wave NMR spectrometer.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.2.1 The preferred units are mass %.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Publication Date
30-Apr-2020
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ASTM D7171-20 - Standard Test Method for Hydrogen Content of Middle Distillate Petroleum Products by Low-Resolution Pulsed Nuclear Magnetic Resonance Spectroscopy
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7171 − 20
Standard Test Method for
Hydrogen Content of Middle Distillate Petroleum Products
by Low-Resolution Pulsed Nuclear Magnetic Resonance
1
Spectroscopy
This standard is issued under the fixed designation D7171; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Resonance Spectrometry
D4057Practice for Manual Sampling of Petroleum and
1.1 This test method covers the determination of the hydro-
Petroleum Products
gen content of middle distillate petroleum products using a
D4808 Test Methods for Hydrogen Content of Light
low-resolution pulsed nuclear magnetic resonance (NMR)
Distillates, Middle Distillates, Gas Oils, and Residua by
spectrometer. The boiling range of distillates covered by the
Low-Resolution Nuclear Magnetic Resonance Spectros-
testmethodis150°Cto390°C.Whilethistestmethodmaybe
copy
applicable to middle distillates outside this boiling range, in
D5291Test Methods for Instrumental Determination of
such cases the precision statements may not apply. The test
Carbon, Hydrogen, and Nitrogen in Petroleum Products
methodisgenerallybasedonTestMethodsD3701andD4808,
and Lubricants
with a major difference being the use of a pulsed NMR
D6299Practice for Applying Statistical Quality Assurance
spectrometerinsteadofacontinuouswaveNMRspectrometer.
and Control Charting Techniques to Evaluate Analytical
1.2 The values stated in SI units are to be regarded as
Measurement System Performance
standard. No other units of measurement are included in this
D6708Practice for StatisticalAssessment and Improvement
standard.
of Expected Agreement Between Two Test Methods that
1.2.1 The preferred units are mass%.
Purport to Measure the Same Property of a Material
1.3 This standard does not purport to address all of the
2.2 Other Documents:
safety concerns, if any, associated with its use. It is the MIL-DTL-5624Turbine Fuel, Aviation, Grades JP-4 and
3
responsibility of the user of this standard to establish appro-
JP-5
priate safety, health, and environmental practices and deter-
MIL-DTL-83133Turbine Fuel, Aviation, Kerosene Type,
mine the applicability of regulatory limitations prior to use. JP-8 (NATO F-34), NATO F-35, and JP-8+100 (NATO
1.4 This international standard was developed in accor-
F-37)
dance with internationally recognized principles on standard- MIL-DTL-16884Fuel, Naval Distillate
ization established in the Decision on Principles for the
3. Terminology
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
3.1 Definitions:
Barriers to Trade (TBT) Committee. 3.1.1 calibration, n—the determination of the values of the
significant parameters by comparison with values indicated by
2. Referenced Documents
a set of calibration standards.
2
2.1 ASTM Standards:
3.1.2 calibration curve (or calibration line), n—the graphi-
D3701Test Method for Hydrogen Content of Aviation
cal or mathematical representation of a relationship between
Turbine Fuels by Low Resolution Nuclear Magnetic
the assigned (known) values of calibration standards and the
measured responses from the measurement system.
1
This test method is under the jurisdiction of ASTM Committee D02 on
3.1.3 calibration standard, n—a standard having an as-
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
signed (known) value (reference value) for use in calibrating a
Subcommittee D02.03 on Elemental Analysis.
measurementinstrumentorsystem.Thisstandardisnotusedto
Current edition approved May 1, 2020. Published June 2020. Originally
determine the accuracy of the measurement instrument or
approved in 2005. Last previous edition approved in 2016 as D7171 – 16. DOI:
10.1520/D7171-20.
system (see check standard).
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 Available online at the ASSIST Quick Search website http://
the ASTM website. quicksearch.dla.mil.
*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
1

---------------------- Page: 1 ----------------------
D7171 − 20
3.1.4 check standard, n—in QC testing, material having an combustor liner burnout will occur. Hydrogen conte
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7171 − 16 D7171 − 20
Standard Test Method for
Hydrogen Content of Middle Distillate Petroleum Products
by Low-Resolution Pulsed Nuclear Magnetic Resonance
1
Spectroscopy
This standard is issued under the fixed designation D7171; 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.
1. Scope*
1.1 This test method covers the determination of the hydrogen content of middle distillate petroleum products using a
low-resolution pulsed nuclear magnetic resonance (NMR) spectrometer. The boiling range of distillates covered by the test method
is 150 °C to 390 °C. While this test method may be applicable to middle distillates outside this boiling range, in such cases the
precision statements may not apply. The test method is generally based on Test Methods D3701 and D4808, with a major difference
being the use of a pulsed NMR spectrometer instead of a continuous wave NMR spectrometer.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.2.1 The preferred units are mass %.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D3701 Test Method for Hydrogen Content of Aviation Turbine Fuels by Low Resolution Nuclear Magnetic Resonance
Spectrometry
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4808 Test Methods for Hydrogen Content of Light Distillates, Middle Distillates, Gas Oils, and Residua by Low-Resolution
Nuclear Magnetic Resonance Spectroscopy
D5291 Test Methods for Instrumental Determination of Carbon, Hydrogen, and Nitrogen in Petroleum Products and Lubricants
D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measure-
ment System Performance
D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport
to Measure the Same Property of a Material
2.2 Other Documents:
3
MIL-DTL-5624 Turbine Fuel, Aviation, Grades JP-4 and JP-5
MIL-DTL-83133 Turbine Fuel, Aviation, Kerosene Type, JP-8 (NATO F-34), NATO F-35, and JP-8+100 (NATO F-37)
MIL-DTL-16884 Fuel, Naval Distillate
3. Terminology
3.1 Definitions:
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.03 on Elemental Analysis.
Current edition approved Oct. 1, 2016May 1, 2020. Published October 2016June 2020. Originally approved in 2005. Last previous edition approved in 2016 as D7171
– 05 (2016). 16. DOI: 10.1520/D7171-16.10.1520/D7171-20.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available online at the ASSIST Quick Search website http://quicksearch.dla.mil.
*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
1

---------------------- Page: 1 ----------------------
D7171 − 20
3.1.1 calibration, n—the determination of the values of the significant parameters by comparison with values indicated by a set
of calibration standards.
3.1.2 calibration curve (or calibration line), n—the graphical or mathematical representation of a relationship between the
assigned (known) values of calibration standards and the measured responses from the measurement system.
3.1.3 calibration standard, n—a standard having an assigned (known) value (reference value) for use in calibrating a
measurement instrument o
...

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