ASTM D2425-04
(Test Method)Standard Test Method for Hydrocarbon Types in Middle Distillates by Mass Spectrometry
Standard Test Method for Hydrocarbon Types in Middle Distillates by Mass Spectrometry
SIGNIFICANCE AND USE
A knowledge of the hydrocarbon composition of process streams and petroleum products boiling within the range of 400 to 650°F (204 to 343°C) is useful in following the effect of changes in process variables, diagnosing the source of plant upsets, and in evaluating the effect of changes in composition on product performance properties.
SCOPE
1.1 This test method covers an analytical scheme using the mass spectrometer to determine the hydrocarbon types present in virgin middle distillates 204 to 343C (400 to 650F) boiling range, 5 to 95 volume % as determined by Test Method D 86. Samples with average carbon number value of paraffins between C12 and C16 and containing paraffins from C10 and C 18 can be analyzed. Eleven hydrocarbon types are determined. These include: paraffins, noncondensed cycloparaffins, condensed dicycloparaffins, condensed tricycloparaffins, alkylbenzenes, indans or tetralins, or both, CnH2n-10(indenes, etc.), naphthalenes, C nH2n-14(acenaphthenes, etc.), CnH2n-16(acenaphthylenes, etc.), and tricyclic aromatics. Note 1This test method was developed on consolidated Electro-dynamics Corp. Type 103 Mass Spectrometers.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.
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. For a specific hazard statement, see .
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D2425–04
Standard Test Method for
Hydrocarbon Types in Middle Distillates by Mass
1
Spectrometry
This standard is issued under the fixed designation D2425; 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* D2549 Test Method for Separation of Representative Aro-
matics and Nonaromatics Fractions of High-Boiling Oils
1.1 This test method covers an analytical scheme using the
by Elution Chromatography
mass spectrometer to determine the hydrocarbon types present
invirginmiddledistillates204to343°C(400to650°F)boiling
3. Terminology
range, 5 to 95 volume% as determined by Test Method D86.
3.1 The summation of characteristic mass fragments are
Samples with average carbon number value of paraffins be-
defined as follows:
tween C and C and containing paraffins from C and C
12 16 10 18
+
(71 (paraffins)=total peak height of m/e 71 + 85.
can be analyzed. Eleven hydrocarbon types are determined.
(67 (mono or noncondensed polycycloparaffins, or
These include: paraffins, noncondensed cycloparaffins, con-
+
both) = total peak height of m/e 67+68+69+81
densed dicycloparaffins, condensed tricycloparaffins, alkylben-
+82+83+96+97.
zenes, indans or tetralins, or both, C H (indenes, etc.),
n 2n-10
(123 (condensed dicycloparaffins)=total peak height of
naphthalenes, C H (acenaphthenes, etc.), C H
n 2n-14 n 2n-
+
m/e 123+124+137+138+··· etc. up to 249+250.
16 (acenaphthylenes, etc.), and tricyclic aromatics.
(149 (condensed tricycloparaffins)=total peak height of
+
NOTE 1—This test method was developed on consolidated Electro-
m/e 149+150+163+164+··· etc. up to 247+248.
dynamics Corp. Type 103 Mass Spectrometers. +
(91 (alkyl benzenes) = total peak height of m/e
1.2 The values stated in SI units are to be regarded as the
91+92+105+106+··· etc. up to 175+176.
standard. The inch-pound units given in parentheses are for
(103 (indans or tetralins, or both)=total peak height of
+
information only.
m/e 103+104+117+118+··· etc. up to 187+188.
1.3 This standard does not purport to address all of the
(115 (indenes or C H , or both)=total peak height of
n 2n-10
+
safety problems, if any, associated with its use. It is the
m/e 115+116+129+130+··· etc. up to 185+186.
+
responsibility of the user of this standard to establish appro-
128 (naphthalene)=total peak height of m/e 128.
+
priate safety and health practices and determine the applica-
(141 (naphthalenes) = total peak height of m/e
bility of regulatory limitations prior to use. For a specific
141+142+155+156+··· etc. up to 239+240.
hazard statement, see 10.1.
(153 (acenaphthenes or C H , or both)=total peak
n 2n-14
+
height of m/e 153 + 154 + 167 + 168 + ··· etc. up to
2. Referenced Documents
251+252.
2
2.1 ASTM Standards:
(151 (acenaphthylenes or C H , or both)=total peak
n 2n-16
+
D86 Test Method for Distillation of Petroleum Products at
height of m/e 151 + 152 + 165 + 166 + ··· etc. up to
Atmospheric Pressure
249+250.
+
(177 (tricyclic aromatics) = total peak height of m/e
177+178+191+192+··· etc. up to 247+248.
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee 4. Summary of Test Method
D02.04 on Hydrocarbon Analysis.
4.1 Samples are separated into saturate and aromatic frac-
Current edition approved Nov. 1, 2004. Published November 2004. Originally
tions by Test Method D2549, and each fraction is analyzed by
approved in 1965. Last previous edition approved in 1999 as D2425–99. DOI:
10.1520/D2425-04.
mass spectrometry. The analysis is based on the summation of
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
characteristicmassfragmentstodeterminetheconcentrationof
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
hydrocarbon types. The average carbon numbers of the hydro-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. carbon types are estimated from spectral data. Calculations are
*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 ----------------------
D2425–04
madefromcalibrationdatadependentupontheaveragecarbon dance with this method and instructions of the manufacturer to
number of the hydrocarbon types. The results of each fraction ensure stability before proceeding.
are mathematically combined according to their mass fractions
9.2 Mass Spectral Background—Samples in the carbon
as determ
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.