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ASTM D2786-91(1996)

(Test Method)

Standard Test Method for Hydrocarbon Types Analysis of Gas-Oil Saturates Fractions by High Ionizing Voltage Mass Spectrometry

Standard Test Method for Hydrocarbon Types Analysis of Gas-Oil Saturates Fractions by High Ionizing Voltage Mass Spectrometry

SCOPE
1.1 This test method covers the determination by high ionizing voltage mass spectrometry of seven saturated hydrocarbon types and one aromatic type in saturate petroleum fractions having average carbon numbers 16 through 32. The saturate types include alkanes (0-rings), single-ring naphthenes, and five fused naphthene types with 2, 3, 4, 5, and 6 rings. The nonsaturate type is monoaromatic. Noncondensed naphthenes are analyzed as single rings. Samples must be nonolefinic and must contain less than 5 volume % monoaromatic. Composition data are in volume percent.
1.2 The values stated in acceptable SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
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.

General Information

Status
Historical
Publication Date
14-Oct-1991
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.04.0M - Mass Spectrometry
Current Stage
Ref Project

Relations

Replaced By
ASTM D2786-91(2001)e1 - Standard Test Method for Hydrocarbon Types Analysis of Gas-Oil Saturates Fractions by High Ionizing Voltage Mass Spectrometry
Effective Date
15-Oct-1991

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ASTM D2786-91(1996) - Standard Test Method for Hydrocarbon Types Analysis of Gas-Oil Saturates Fractions by High Ionizing Voltage Mass SpectrometryASTM D2786-91(1996) - Standard Test Method for Hydrocarbon Types Analysis of Gas-Oil Saturates Fractions by High Ionizing Voltage Mass Spectrometry
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ASTM D2786-91(1996) - Standard Test Method for Hydrocarbon Types Analysis of Gas-Oil Saturates Fractions by High Ionizing Voltage Mass Spectrometry
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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: D 2786 – 91 (Reapproved 1996) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Hydrocarbon Types Analysis of Gas-Oil Saturates Fractions
1
by High Ionizing Voltage Mass Spectrometry
This standard is issued under the fixed designation D 2786; 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.
( 71 5 71 1 85 1 99 1 113 ~alkanes!. (1)
1. Scope
2
3.1.1.2
1.1 This test method covers the determination by high
ionizing voltage mass spectrometry of seven saturated
( 69 5 69 1 83 1 97 1 111 1 125 1 139 ~12ring!. (2)
hydrocarbon types and one aromatic type in saturate petroleum
3.1.1.3
fractions having average carbon numbers 16 through 32. The
( 109 5 109 1 123 1 137 1 151 1 165 1 179 1 193 ~22ring!.
saturate types include alkanes (0-rings), single-ring
(3)
naphthenes, and five fused naphthene types with 2, 3, 4, 5, and
3.1.1.4
6 rings. The nonsaturate type is monoaromatic. Noncondensed
naphthenes are analyzed as single rings. Samples must be
( 149 5 149 1 163 1 177 1 191 1 205 1 219 1 233 1 247 ~32ring!.
(4)
nonolefinic and must contain less than 5 volume %
monoaromatic. Composition data are in volume percent.
3.1.1.5
1.2 The values stated in acceptable SI units are to be
( 189 5 189 1 203 1 217 1 231 1 245 1 259 1 273 1 287
regarded as the standard. The values given in parentheses are
1 301 ~42ring!. (5)
provided for information purposes only.
3.1.1.6
1.3 This standard does not purport to address all of the
( 229 5 229 1 243 1 257 1 271 1 285 1 299 1 313 1 327 1 341
safety concerns, if any, associated with its use. It is the
1 355 ~52ring!. (6)
responsibility of the user of this standard to establish
appropriate safety and health practices and determine the 3.1.1.7
applicability of regulatory limitations prior to use.
( 269 5 269 1 283 1 297 1 311 1 325 1 339 1 353 1 367 1 381
1 395 1 409 ~62ring!. (7)
2. Referenced Documents
3.1.1.8
2.1 ASTM Standards:
( 91 5 91 1 105 1 117 1 119 1 129 1 131 1 133 1 143 1 145
D 2549 Test Method for Separation of Representative
1 147 1 157 1 159 1 171 ~monoaromatic!. (8)
Aromatics and Nonaromatics Fractions of High-Boiling
3
Oils by Elution Chromatography
4. Summary of Test Method
D 3239 Test Method for Aromatic Types Analysis of Gas-
4.1 The relative abundance of alkanes (0-ring), 1-ring,
Oil Aromatic Fractions by High Ionizing Voltage Mass
, 2-ring, 3-ring, 4-ring, 5-ring, and 6-ring naphthenes in
3 4
Spectrometry
petroleum saturate fractions is determined by mass
E 137 Practice for Evaluation of Mass Spectrometers for
spectrometry using a summation of mass fragment groups most
5
Quantitative Analysis from a Batch Inlet
characteristic of each molecular type. Calculations are carried
out by the use of inverted matrices (derived from ion intensity
3. . Terminology
calibration sensitivities) that are specific for any average
3.1 Definitions of Terms Specific to This Standard:
carbon number. The saturate fraction is obtained by liquid
3.1.1 Characteristic Mass Groupings:
elution chromatography, see Test Method D 2549.
3.1.1.1
5. Significance and Use
1
This test method is under the jurisdiction of ASTM Committee D-2 on
5.1 A knowledge of the hydrocarbon composition of process
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
streams and petroleum products boiling within the range of 205
D02.04on Hydrocarbon Analysis.
to 540°C (400 to 1000°F) is useful in following the effect of
Current edition approved Oct. 15, 1991. Published December 1991. Originally
published, as D 2786 – 69. Last previous edition, D 2786 – 86.
changes in process variables, diagnosing the source of plant
2
Hood, A., and O’Neal, M. J., Advances in Mass Spectrometry, AMSPA,
upsets and in evaluating the effect of changes in composition
Waldron, 1959, p. 175.
3
on product performance properties.
Annual Book of ASTM Standards, Vol 05.02.
4
Annual Book of ASTM Standards, Vol 05.03. 5.2 This test method, when used together with Test Method
5
Discontinued; see 1993 Annual Book of ASTM Standards, Vol 05.03.
1

---------------------- Page: 1 ----------------------
D 2786
D 3239, provides a detailed analysis of the hydrocarbon 6.3 Microburet or Constant-Volume Pipet.
composition of such materials.
7. Reagents
6. Apparatus
7.1 n-Hexadecane.
6.1 Mass Spectrometer—The suitability of the mass
spectrometer to be used with this method shall be proven by
NOTE 1—Warning: Combustible. Vapor harmful.
performance tests describe
...

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