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ASTM D5292-99(2014)

(Test Method)

Standard Test Method for Aromatic Carbon Contents of Hydrocarbon Oils by High Resolution Nuclear Magnetic Resonance Spectroscopy (Withdrawn 2018)

Standard Test Method for Aromatic Carbon Contents of Hydrocarbon Oils by High Resolution Nuclear Magnetic Resonance Spectroscopy (Withdrawn 2018)

SIGNIFICANCE AND USE
5.1 Aromatic content is a key characteristic of hydrocarbon oils and can affect a variety of properties of the oil including its boiling range, viscosity, stability, and compatibility of the oil with polymers.  
5.2 Existing methods for estimating aromatic contents use physical measurements, such as refractive index, density, and number average molecular weight (see Test Method D3238) or infrared absorbance4 and often depend on the availability of suitable standards. These NMR procedures do not require standards of known aromatic hydrogen or aromatic carbon contents and are applicable to a wide range of hydrocarbon oils that are completely soluble in chloroform at ambient temperature.  
5.3 The aromatic hydrogen and aromatic carbon contents determined by this test method can be used to evaluate changes in aromatic contents of hydrocarbon oils due to changes in processing conditions and to develop processing models in which the aromatic content of the hydrocarbon oil is a key processing indicator.
SCOPE
1.1 This test method covers the determination of the aromatic hydrogen content (Procedures A and B) and aromatic carbon content (Procedure C) of hydrocarbon oils using high-resolution nuclear magnetic resonance (NMR) spectrometers. Applicable samples include kerosenes, gas oils, mineral oils, lubricating oils, coal liquids, and other distillates that are completely soluble in chloroform at ambient temperature. For pulse Fourier transform (FT) spectrometers, the detection limit is typically 0.1 mol % aromatic hydrogen atoms and 0.5 mol % aromatic carbon atoms. For continuous wave (CW) spectrometers, which are suitable for measuring aromatic hydrogen contents only, the detection limit is considerably higher and typically 0.5 mol % aromatic hydrogen atoms.  
1.2 The reported units are mole percent aromatic hydrogen atoms and mole percent aromatic carbon atoms.  
1.3 This test method is not applicable to samples containing more than 1 mass % olefinic or phenolic compounds.  
1.4 This test method does not cover the determination of the percentage mass of aromatic compounds in oils since NMR signals from both saturated hydrocarbons and aliphatic substituents on aromatic ring compounds appear in the same chemical shift region. For the determination of mass or volume percent aromatics in hydrocarbon oils, chromatographic, or mass spectrometry methods can be used.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 This standard does not purport to address all of the safety problems, 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. Specific precautionary statements are given in 7.2 and 7.3.
WITHDRAWN RATIONALE
This test method covers the determination of the aromatic hydrogen content (Procedures A and B) and aromatic carbon content (Procedure C) of hydrocarbon oils using high-resolution nuclear magnetic resonance (NMR) spectrometers. Applicable samples include kerosenes, gas oils, mineral oils, lubricating oils, coal liquids, and other distillates that are completely soluble in chloroform at ambient temperature. For pulse Fourier transform (FT) spectrometers, the detection limit is typically 0.1 mol % aromatic hydrogen atoms and 0.5 mol % aromatic carbon atoms. For continuous wave (CW) spectrometers, which are suitable for measuring aromatic hydrogen contents only, the detection limit is considerably higher and typically 0.5 mol % aromatic hydrogen atoms.
Formerly under the jurisdiction of Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants, this test method was withdrawn in October 2018 because it is no longer in use.

General Information

Status
Withdrawn
Publication Date
31-May-2014
Withdrawal Date
01-Oct-2018
ICS
75.080 - Petroleum products in general
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.04.0F - Absorption Spectroscopic Methods
Current Stage
Ref Project

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ASTM D5292-99(2014) - Standard Test Method for Aromatic Carbon Contents of Hydrocarbon Oils by High Resolution Nuclear Magnetic Resonance Spectroscopy (Withdrawn 2018)ASTM D5292-99(2014) - Standard Test Method for Aromatic Carbon Contents of Hydrocarbon Oils by High Resolution Nuclear Magnetic Resonance Spectroscopy (Withdrawn 2018)
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ASTM D5292-99(2014) - Standard Test Method for Aromatic Carbon Contents of Hydrocarbon Oils by High Resolution Nuclear Magnetic Resonance Spectroscopy (Withdrawn 2018)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5292 − 99 (Reapproved 2014)
Standard Test Method for
Aromatic Carbon Contents of Hydrocarbon Oils by High
1
Resolution Nuclear Magnetic Resonance Spectroscopy
This standard is issued under the fixed designation D5292; 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 2. Referenced Documents
2
1.1 This test method covers the determination of the aro- 2.1 ASTM Standards:
matic hydrogen content (Procedures A and B) and aromatic D3238Test Method for Calculation of Carbon Distribution
carbon content (Procedure C) of hydrocarbon oils using and Structural Group Analysis of Petroleum Oils by the
high-resolution nuclear magnetic resonance (NMR) spectrom- n-d-M Method
eters. Applicable samples include kerosenes, gas oils, mineral D3701Test Method for Hydrogen Content of Aviation
oils, lubricating oils, coal liquids, and other distillates that are Turbine Fuels by Low Resolution Nuclear Magnetic
completely soluble in chloroform at ambient temperature. For Resonance Spectrometry
pulse Fourier transform (FT) spectrometers, the detection limit D4057Practice for Manual Sampling of Petroleum and
istypically0.1mol%aromatichydrogenatomsand0.5mol% Petroleum Products
aromatic carbon atoms. For continuous wave (CW) E386Practice for Data Presentation Relating to High-
spectrometers, which are suitable for measuring aromatic Resolution Nuclear Magnetic Resonance (NMR) Spec-
hydrogen contents only, the detection limit is considerably troscopy
higher and typically 0.5 mol % aromatic hydrogen atoms.
2.2 Energy Institute Methods:
IP Proposed Method BD Aromatic Hydrogen and Aromatic
1.2 The reported units are mole percent aromatic hydrogen
CarbonContentsofHydrocarbonOilsbyHighResolution
atoms and mole percent aromatic carbon atoms.
3
Nuclear Magnetic Resonance Spectroscopy
1.3 Thistestmethodisnotapplicabletosamplescontaining
more than 1 mass % olefinic or phenolic compounds.
3. Terminology
1.4 Thistestmethoddoesnotcoverthedeterminationofthe
3.1 Definitions of Terms Specific to This Standard:
percentage mass of aromatic compounds in oils since NMR
3.1.1 aromatic carbon content—mole percent aromatic car-
signals from both saturated hydrocarbons and aliphatic sub-
bon atoms or the percentage of aromatic carbon of the total
stituents on aromatic ring compounds appear in the same
carbon:
chemicalshiftregion.Forthedeterminationofmassorvolume
aromatic carbon content 51003 (1)
percent aromatics in hydrocarbon oils, chromatographic, or
mass spectrometry methods can be used.
aromatic carbon atoms / total carbon atoms
~ ! ~ !
1.5 The values stated in SI units are to be regarded as 3.1.1.1 Discussion—For example, the aromatic carbon con-
standard. No other units of measurement are included in this
tent of toluene is 100×(6⁄7) or 85.7 mol % aromatic carbon
standard. atoms.
1.6 This standard does not purport to address all of the
3.1.2 aromatic hydrogen content—mole percent aromatic
safety problems, if any, associated with its use. It is the hydrogen atoms or the percentage of aromatic hydrogen of the
responsibility of the user of this standard to establish appro-
total hydrogen:
priate safety and health practices and determine the applica-
aromatic hydrogen content 51003 (2)
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in 7.2 and 7.3.
~aromatic hydrogen atoms!/~total hydrogen atoms!
1 2
This test method is under the jurisdiction of ASTM Committee D02 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Subcommittee D02.04.0F on Absorption Spectroscopic Methods. Standards volume information, refer to the standard’s Document Summary page on
CurrenteditionapprovedJune1,2014.PublishedJuly2014.Originallyapproved the ASTM website.
3
in 1992. Last previous edition approved in 2009 as D5292–99(2009). DOI: Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
10.1520/D5292-99R14. U.K.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5292 − 99 (2014)
TABLE 1 Sample and Instrument Conditions for Continuous
3.1.2.1 Discussion—For example, the aromatic hydrogen
1
Wave (CW) Measurements of H NMR Spectra
content of toluene is 100×(5⁄8) or 62.5 mol % aromatic
Solvent Chloroform-d
hydrogen atoms.
Sample concentration Up to 50 % v/v for distillable oils
Sample temperature I
...

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