ASTM D2710-09
(Test Method)Standard Test Method for Bromine Index of Petroleum Hydrocarbons by Electrometric Titration
Standard Test Method for Bromine Index of Petroleum Hydrocarbons by Electrometric Titration
SIGNIFICANCE AND USE
This test method provides a measure of trace amounts of unsaturated hydrocarbons in petroleum distillates boiling up to 288°C (550°F). An estimate of the quantity of these materials is useful in assessing the suitability of the lighter fractions for use as reaction solvents.
SCOPE
1.1 This test method covers the determination of the amount of bromine-reactive material in petroleum hydrocarbons and is thus a measure of trace amounts of unsaturates in these materials. It is applicable to materials having bromine indexes below 1000.
1.2 This test method is applicable only to essentially olefin-free hydrocarbons or mixtures that are substantially free from material lighter than isobutane and have a distillation end point under 288°C (550°F).
Note 1—This procedure has been cooperatively tested on materials with bromine indexes in the range from 100 to 1000. These materials include petroleum distillates such as straight-run and hydrocracked naphtha, reformer feed, kerosine, and aviation turbine fuel.
Note 2—Materials with bromine index greater than 1000 should be tested for bromine number using Test Method D1159/IP 130.
Note 3—Bromine index of industrial aromatic hydrocarbons should be determined using Test Method D1492 or D5776. The subcommittee is currently examining ways to achieve more consistent end point values.
1.3 The values stated in SI units are to be regarded as standard. The values stated in inch-pound units are for information only.
1.4 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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Designation: D2710 − 09
Designation:299/92 (98)
Standard Test Method for
Bromine Index of Petroleum Hydrocarbons by Electrometric
1
Titration
This standard is issued under the fixed designation D2710; 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* D1159 Test Method for Bromine Numbers of Petroleum
Distillates and Commercial Aliphatic Olefins by Electro-
1.1 This test method covers the determination of the amount
metric Titration
of bromine-reactive material in petroleum hydrocarbons and is
D1492 Test Method for Bromine Index of Aromatic Hydro-
thus a measure of trace amounts of unsaturates in these
carbons by Coulometric Titration
materials. It is applicable to materials having bromine indexes
D5776 Test Method for Bromine Index of Aromatic Hydro-
below 1000.
carbons by Electrometric Titration
1.2 This test method is applicable only to essentially olefin-
free hydrocarbons or mixtures that are substantially free from
3. Terminology
material lighter than isobutane and have a distillation end point
3.1 Definitions:
under 288°C (550°F).
3.1.1 bromine index—the number of milligrams of bromine
NOTE 1—This procedure has been cooperatively tested on materials
that will react with 100 g of sample under the conditions of the
with bromine indexes in the range from 100 to 1000. These materials
test.
include petroleum distillates such as straight-run and hydrocracked
naphtha, reformer feed, kerosine, and aviation turbine fuel.
NOTE 2—Materials with bromine index greater than 1000 should be 4. Summary of Test Method
tested for bromine number using Test Method D1159/IP 130.
4.1 A known mass of the sample dissolved in a specified
NOTE 3—Bromine index of industrial aromatic hydrocarbons should be
solvent is titrated with standard bromide-bromate solution.The
determined using Test Method D1492 or D5776. The subcommittee is
currently examining ways to achieve more consistent end point values.
end point is indicated by a dead stop electrometric titration
apparatus when the presence of free bromine causes a sudden
1.3 The values stated in SI units are to be regarded as
change in the electrical conductivity of the system.
standard. The values stated in inch-pound units are for infor-
mation only.
5. Significance and Use
1.4 This standard does not purport to address all of the
5.1 This test method provides a measure of trace amounts of
safety concerns, if any, associated with its use. It is the
unsaturated hydrocarbons in petroleum distillates boiling up to
responsibility of the user of this standard to establish appro-
288°C (550°F). An estimate of the quantity of these materials
priate safety and health practices and determine the applica-
is useful in assessing the suitability of the lighter fractions for
bility of regulatory limitations prior to use.
use as reaction solvents.
2. Referenced Documents
6. Apparatus
2
2.1 ASTM Standards:
6.1 Electrometric End Point Titration Apparatus—Any ap-
paratus designed to perform titrations to pre-set end points (see
1
This test method is under the jurisdiction of ASTM Committee D02 on
Note 4) may be used in conjunction with a high-resistance
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
polarizing current supply capable of maintaining approxi-
D02.04.0D on Physical and Chemical Methods.
mately 0.8 V across two platinum electrodes and with a
Current edition approved Oct. 1, 2009. Published November 2009. Originally
ϵ1
sensitivity such that a voltage change of approximately 50 mV
approved in 1968. Last previous edition approved in 2004 as D2710–99(2004) .
DOI: 10.1520/D2710-09.
at these electrodes is sufficient to indicate the end point. Other
In the IP, this test method is under the jurisdiction of the Standardization
types of commercially available electric titrimeters, including
Committee.
2 certain pH meters, have also been found to be suitable.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 4—Pre-set end point indicated with polarized electrodes provides
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 a detection technique similar to the dead stop technique specified in
the ASTM website. previous versions of this test method.
*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
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D2710 − 09
6.2 Titration Vessel—A jacke
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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.
´1
Designation:D2710–99 (Reapproved 2004) Designation: D2710 – 09
Designation: 299/92 (98)
Standard Test Method for
Bromine Index of Petroleum Hydrocarbons by Electrometric
1
Titration
This standard is issued under the fixed designation D2710; 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
´ NOTE—Warning notes were editorially moved into the standard text in May 2004.
1. Scope*
1.1 Thistestmethodcoversthedeterminationoftheamountofbromine-reactivematerialinpetroleumhydrocarbonsandisthus
a measure of trace amounts of unsaturates in these materials. It is applicable to materials having bromine indexes below 1000.
1.2 This test method is applicable only to essentially olefin-free hydrocarbons or mixtures that are substantially free from
material lighter than isobutane and have a distillation end point under 288°C (550°F).
1.3The values stated in SI units are to be regarded as standard. The values stated in inch-pound units are for information only.
1.4This 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.
NOTE 1—This procedure has been cooperatively tested on materials with bromine indexes in the range from 100 to 1000. These materials include
petroleum distillates such as straight-run and hydrocracked naphtha, reformer feed, kerosine, and aviation turbine fuel.
NOTE 2—Materials with bromine index greater than 1000 should be tested for bromine number using Test Method D1159/IP 130.
NOTE 3—Bromine index of industrial aromatic hydrocarbons should be determined using Test Method D1492 or D5776. . The subcommittee is
currently examining ways to achieve more consistent end point values.
1.3 The values stated in SI units are to be regarded as standard. The values stated in inch-pound units are for information only.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1159 TestMethodforBromineNumbersofPetroleumDistillatesandCommercialAliphaticOlefinsbyElectrometricTitration
D1492 Test Method for Bromine Index of Aromatic Hydrocarbons by Coulometric Titration
D5776 Test Method for Bromine Index of Aromatic Hydrocarbons by Electrometric Titration
3. Terminology
3.1 Definition: Definitions:
3.1.1 bromine index—the number of milligrams of bromine that will react with 100 g of sample under the conditions of the test.
4. Summary of Test Method
4.1 A known mass of the sample dissolved in a specified solvent is titrated with standard bromide-bromate solution. The end
point is indicated by a dead stop electrometric titration apparatus when the presence of free bromine causes a sudden change in
the electrical conductivity of the system.
1
This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.04.0D
on Hydrocarbon Analysis. Physical and Chemical Methods.
Current edition approved MayOct. 1, 2004.2009. Published May 2004.November 2009. Originally approved in 1968. Last previous edition approved in 19992004 as
´1
D2710–99. D2710–99(2004) . DOI: 10.1520/D2710-09.
In the IP, this test method is under the jurisdiction of the Standardization Committee. DOI: 10.1520/D2710-99R04E01.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
*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 ----------------------
D2710 – 09
5. Significance and Use
5.1 This test method provides a measure of trace amounts of unsaturated hydrocarbons in petroleum distillates boiling up to
288°C (550°F). An estimate of the quantity of th
...
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