ASTM D7213-05
(Test Method)Standard Test Method for Boiling Range Distribution of Petroleum Distillates in the Boiling Range from 100 to 615°C by Gas Chromatography
Standard Test Method for Boiling Range Distribution of Petroleum Distillates in the Boiling Range from 100 to 615°C by Gas Chromatography
SIGNIFICANCE AND USE
The boiling range distribution of light and medium petroleum distillate fractions provides an insight into the composition of feed stocks and products related to petroleum refining process, This gas chromatographic determination of boiling range can be used to replace conventional distillation methods for control of refining operations. This test method can be used for product specification testing with the mutual agreement of interested parties.
This test method extends the scope of boiling range determination by gas chromatography to include light and medium petroleum distillate fractions beyond the scope of Test Method D 2887 (538°C) and below Test Method D 6352 (700°C).
Boiling range distributions obtained by this test method are theoretically equivalent to those obtained by true boiling point (TBP) distillation (see Test Method D 2892). They are not equivalent to results from low efficiency distillation such as those obtained with Test Method D 86 or D 1160.
SCOPE
1.1 This test method covers the determination of the boiling range distribution of petroleum products. This test method is applicable to petroleum distillates having an initial boiling point greater than 100°C and a final boiling point less than 615°C at atmospheric pressure as measured by this test method.
1.2 The test method is not applicable for analysis of petroleum distillates containing low molecular weight components (for example, naphthas, reformates, gasolines, crude oils). Materials containing heterogeneous components (for example, alcohols, ethers, acids or esters) or residue are not to be analyzed by this test method. See Test Methods D 3710, D 2887, D 6352, or D 5307.
1.3 This test method uses the principles of simulated distillation methodology.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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.
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Standards Content (Sample)
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An American National Standard
Designation: D 7213 – 05
Standard Test Method for
Boiling Range Distribution of Petroleum Distillates in the
Boiling Range from 100 to 615°C by Gas Chromatography
This standard is issued under the fixed designation D7213; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D86 Test Method for Distillation of Petroleum Products at
Atmospheric Pressure
1.1 Thistestmethodcoversthedeterminationoftheboiling
D1160 Test Method for Distillation of Petroleum Products
range distribution of petroleum products. This test method is
at Reduced Pressure
applicable to petroleum distillates having an initial boiling
D2887 Test Method for Boiling Range Distribution of
point greater than 100°C and a final boiling point less than
Petroleum Fractions by Gas Chromatography
615°C at atmospheric pressure as measured by this test
D2892 Test Method for Distillation of Crude Petroleum
method.
(15-Theoretical Plate Column)
1.2 The test method is not applicable for analysis of
D3710 Test Method for Boiling Range Distribution of
petroleum distillates containing low molecular weight compo-
Gasoline and Gasoline Fractions by Gas Chromatography
nents (for example, naphthas, reformates, gasolines, crude
D4626 Practice for Calculation of Gas Chromatographic
oils). Materials containing heterogeneous components (for
Response Factors
example, alcohols, ethers, acids or esters) or residue are not to
D5307 Test Method for Determination of Boiling Range
be analyzed by this test method. See Test Methods D3710,
Distribution of Crude Petroleum by Gas Chromatography
D2887, D6352,or D5307.
D6300 Practice for Determination of Precision and Bias
1.3 This test method uses the principles of simulated distil-
Data for Use in Test Methods for Petroleum Products and
lation methodology.
Lubricants
1.4 The values stated in SI units are to be regarded as the
D6352 Test Method for Boiling Range Distribution of
standard. The values given in parentheses are for information
Petroleum Distillates in Boiling Range from 174 to 700°C
only.
by Gas Chromatography
1.5 This standard does not purport to address all of the
E355 Practice for Gas Chromatography Terms and Rela-
safety concerns, if any, associated with its use. It is the
tionships
responsibility of the user of this standard to establish appro-
E594 Practice forTesting Flame Ionization Detectors Used
priate safety and health practices and determine the applica-
in Gas or Supercritical Fluid Chromatography
bility of regulatory limitations prior to use.
E1510 Practice for Installing Fused Silica Open Tubular
2. Referenced Documents
Capillary Columns in Gas Chromatographs
2.1 ASTM Standards:
3. Terminology
3.1 Definitions—This test method makes reference to many
common gas chromatographic procedures, terms, and relation-
This test method is under the jurisdiction of ASTM Committee D02 on
ships. Detailed definitions of these can be found in Practices
PetroleumProductsandLubricantsandisthedirectresponsibilityofSubcommittee
E355, E594, and E1510.
D02.04 on Hydrocarbon Analysis.
Current edition approved Nov. 1, 2005. Published January 2006.
3.2 Definitions of Terms Specific to This Standard:
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.2.1 area slice—the area, resulting from the integration of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the chromatographic detector signal, within a specified reten-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tiontimeinterval.Inareaslicemode(see6.4.2),peakdetection
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D7213–05
parameters are bypassed and the detector signal integral is distribution. The boiling point temperature at each reported
recorded as area slices of consecutive, fixed duration time percent off increment is calculated from the retention time
intervals. calibration.
3.2.2 corrected area slice—an area slice corrected for base-
line offset, by subtraction of the exactly corresponding area
5. Significance and Use
slice in a previously recorded blank (non-sample) analysis.
5.1 The boiling range distribution of light and medium
3.2.3 cumulative corrected area—the accumulated sum of
petroleum distillate fractions provides an insight into the
correctedareaslicesfromthebeginningoftheanalysisthrough
composition of feed stocks and products related to petroleum
a given retention time, ignoring any non-sample area (for
refining process, This gas chromatographic determination of
example, solvent).
boiling range can be used to replace conventional distillation
3.2.4 final boiling point (FBP)—the temperature (corre-
methods for control of refining operations. This test method
spondingtotheretentiontime)atwhichacumulativecorrected
can be used for product specification testing with the mutual
area count equal to 99.5% of the total sample area under the
agreement of interested parties.
chromatogram is obtained.
5.2 This test method extends the scope of boiling range
3.2.5 initial boiling point (IBP)—the temperature (corre-
determination by gas chromatography to include light and
spondingtotheretentiontime)atwhichacumulativecorrected
mediumpetroleumdistillatefractionsbeyondthescopeofTest
area count equal to 0.5% of the total sample area under the
Method D2887 (538°C) and below Test Method D6352
chromatogram is obtained.
(700°C).
3.2.6 slice rate—the time interval used to integrate the
5.3 Boiling range distributions obtained by this test method
continuous (analog) chromatographic detector response during
are theoretically equivalent to those obtained by true boiling
an analysis. The slice rate is expressed in Hz (for example,
point (TBP) distillation (see Test Method D2892). They are
integrations or slices per second).
notequivalenttoresultsfromlowefficiencydistillationsuchas
3.2.7 slice time—the cumulative slice rate (analysis time)
those obtained with Test MethodD86 or D1160.
associatedwitheachareaslicethroughoutthechromatographic
analysis. The slice time is the time at the end of each
6. Apparatus
contiguous area slice.
6.1 Chromatograph—The gas chromatographic system
3.2.8 total sample area—the cumulative corrected area,
used shall have the following performance characteristics:
from the initial point to the final area point.
6.1.1 Column Oven—Capable of sustained and linear pro-
3.3 Abbreviations—A common abbreviation of hydrocar-
grammed temperature operation from near ambient (for ex-
bon compounds is to designate the number of carbon atoms in
ample, 35 to 50°C) up to 400°C.
the compound. A prefix is used to indicate the carbon chain
6.1.2 Column Temperature Programmer—The chromato-
form, while a subscripted suffix denotes the number of carbon
graph shall be capable of linear programmed temperature
atoms (for example, normal decane n-C ; iso-tetradecane =
l0
operationupto400°Catselectablelinearratesupto20°C/min.
i-C ).
l4
The programming rate shall be sufficiently reproducible to
4. Summary of Test Method
obtain the retention time repeatability of 0.1 min (6 s) for each
component in the calibration mixture described in 7.5.
4.1 The boiling range distribution by distillation is simu-
6.1.3 Detector—This test method requires a flame ioniza-
latedbytheuseofgaschromatography.Thesolventshouldnot
tion detector (FID). The detector shall meet or exceed the
interfere with measurement of the sample in the 100 to 615°C
following specifications as detailed in Practice E594. The
range, and it should be apolar. A non-polar open tubular
flame jet should have an orifice of approximately 0.05 to 0.07
(capillary) gas chromatographic column is used to elute the
mm.
hydrocarbon components of the sample in order of increasing
6.1.3.1 Operating Temperature, , 400°C.
boiling point.
6.1.3.2 Sensitivity, >0.005 coulombs/g carbon.
4.2 A sample aliquot is diluted with a viscosity reducing
-11
6.1.3.3 Minimum Detectability,1 3 10 g carbon/s.
solvent and introduced into the chromatographic system.
6.1.3.4 Linear Range, >10 .
Sample vaporization is provided by separate heating of the
point of injection or in conjunction with column oven heating. 6.1.3.5 Connection of the column to the detector shall be
such that no temperature below the column temperature exists.
4.3 Thecolumnoventemperatureisraisedatareproducible
linear rate to effect separation of the hydrocarbon components Refer to Practice E1510 for proper installation and condition-
ing of the capillary column.
in order of increasing boiling point. The elution of sample
components is quantitatively determined using a flame ioniza- 6.1.4 Sample Inlet System—Any sample inlet system ca-
tion detector. The detector signal integral is recorded as area pable of meeting the performance specification in 7.6 may be
slices for consecutive retention time intervals during the used. Programmed temperature vaporization (PTV) and pro-
analysis. grammable cool on-column injection systems have been used
4.4 Retention times of known normal paraffin hydrocarbons successfully.
spanningthescopeofthistestmethod(C -C )aredetermined 6.1.5 Carrier Gas Flow Control—The chromatograph shall
5 60
and correlated to their boiling point temperatures.The normal- beequippedwithcarriergaspressureorflowcontrolcapableof
ized cumulative corrected sample areas for each consecutive maintaining constant carrier gas flow control through the
recorded time interval are used to calculate the boiling range column throughout the column temperature program cycle.
D7213–05
6.2 Microsyringe—A microsyringe with a 23 gauge or 7.2 Hydrogen—Hydrogen of high purity (for example,
smaller stainless steel needle is used for on-column sample hydrocarbon-free) is used as fuel for the flame ionization
introduction. Syringes of 0.1 to 10 µL capacity are available. detector (FID). (Warning—Hydrogen is an extremely flam-
6.2.1 Automatic syringe injection is recommended to mable gas under high pressure.)
achieve best precision. 7.3 Air—High purity (for example, hydrocarbon-free) com-
6.3 Column—This test method is limited to the use of pressed air is used as the oxidant for the flame ionization
non-polar wall coated open tubular (WCOT) columns of high detector(FID).(Warning—Compressedairisagasunderhigh
thermal stability. Glass, fused silica, and stainless steel col- pressure and supports combustion.)
umns, with a 0.53 mm diameter have been successfully used. 7.4 Solvents—Unlessotherwiseindicated,itisintendedthat
Cross-linked or bonded 100% dimethyl-polysiloxane station- all solvents conform to the specifications of the committee on
ary phases with film thickness of 0.5 to 1.0 mm have been analytical Reagents of the American Chemical Society where
used. The column length and liquid phase film thickness shall such specifications are available. Other grades may be used
allow the elution of at least C n-paraffin (BP = 615°C). The provided it is first ascertained that the solvent is of sufficiently
column and conditions shall provide separation of typical high purity to permit its use without lessening the accuracy of
petroleum hydrocarbons in order of increasing boiling point the determination.
and meet the column resolution requirements of 8.2.1. The 7.4.1 Carbon Disulfide (CS )—(99+% pure) may be used
column shall provide a resolution between one and ten using as a viscosity reducing solvent and as a means of reducing
this test method’s operating conditions. mass of sample introduced onto the column to ensure linear
6.4 Data Acquisition System: detector response and reduced peak skewness. It is miscible
6.4.1 Recorder—A 0 to 1 mV range recording potentiom- with asphaltic hydrocarbons and provides a relatively small
eter or equivalent, with a full-scale response time of2sor less response with the FID. The quality (hydrocarbon content)
may be used to provide a graphical display. should be determined by this test method prior to use as a
6.4.2 Integrator—Means shall be provided for determining sample diluent. (Warning—Carbon disulfide is extremely
the accumulated area under the chromatogram. This can be flammable and toxic.)
done by means of an electronic integrator or computer-based 7.5 Cyclohexane (C H )—(99+% pure) may be used as a
6 12
chromatography data system. The integrator/computer system viscosity reducing solvent. It is miscible with asphaltic hydro-
shallhavenormalchromatographicsoftwareformeasuringthe carbons, however, it responds well to the FID. The quality
retention time and areas of eluting peaks (peak detection (hydrocarbon content) should be determined by this test
mode). In addition, the system shall be capable of converting method prior to use as a sample diluent. (Warning—
the continuously integrated detector signal into area slices of Cyclohexane is flammable.)
fixed duration (area slice mode). These contiguous area slices, 7.6 Calibration Mixture—A qualitative mixture of
collectedfortheentireanalysis,arestoredforlaterprocessing. n-paraffins (nominally C to C ) dissolved in a suitable
5 60
Theelectronicrangeoftheintegrator/computer(forexample,1 solvent. The final concentration should be approximately one
V, 10 V) shall be operated within the linear range of the part of n-paraffin mixture to one hundred parts of solvent. At
detector/electrometer system used. least one compound in the mixture shall have a boiling point
lower than the initial boiling point of the sample being
NOTE 1—Some gas chromatographs have an algorithm built into their
analyzed, as defined in the scope of this test method (1.1).The
operating software that allows a mathematical model of the baseline
calibration mixture shall contain at least 13 known n-paraffins
profile to be stored in memory. This profile is automatically subtracted
(for example, C,C,C,C,C ,C ,C ,C ,C ,C ,C ,
from the detector signal on subsequent sample runs to compensate for the
6 7 8 9 10 12 16 20 30 40 50
column bleed. Some integration systems also store and automatically
C ,C ). Boiling points of n-paraffins are listed in Table 1.
52 60
subtract a blank analysis from subsequent analytical determinations.
NOTE 2—A suitable calibration mixture can be obtained by dissolving
3 4
a polyolefin wax (for example, Polywax 500 ) in a volatile solvent (for
7. Reagents and Materials
example,carbondisulfideorcyclohexane).SolutionsofonepartPolywax
7.1 Carrier Gas—Helium, nitrogen or hydrogen of high
to one hundred parts solvent can be prepared. Lower boiling point
purity
...
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