ASTM D2710-20
(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
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 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 given in parentheses after SI units are provided for information only and are not considered standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D2710 − 20
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* 2. Referenced Documents
2
1.1 This test method covers the determination of the amount 2.1 ASTM Standards:
of bromine-reactive material in petroleum hydrocarbons and is D1159 Test Method for Bromine Numbers of Petroleum
thus a measure of trace amounts of unsaturates in these Distillates and Commercial Aliphatic Olefins by Electro-
materials. It is applicable to materials having bromine indexes metric Titration
below 1000. D1492 Test Method for Bromine Index of Aromatic Hydro-
carbons by Coulometric Titration
1.2 This test method is applicable only to essentially olefin-
D5776 Test Method for Bromine Index of Aromatic Hydro-
free hydrocarbons or mixtures that are substantially free from
carbons by Electrometric Titration
material lighter than isobutane and have a distillation end point
under 288 °C (550 °F).
3. Terminology
NOTE 1—This procedure has been cooperatively tested on materials
with bromine indexes in the range from 100 to 1000. These materials
3.1 Definitions:
include petroleum distillates such as straight-run and hydrocracked
3.1.1 bromine index, n—the number of milligrams of bro-
naphtha, reformer feed, kerosine, and aviation turbine fuel.
mine that will react with 100 g of sample under the conditions
NOTE 2—Materials with bromine index greater than 1000 should be
of the test.
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
4. Summary of Test Method
currently examining ways to achieve more consistent end point values.
4.1 A known mass of the sample dissolved in a specified
1.3 The values stated in SI units are to be regarded as
solvent is titrated with standard bromide-bromate solution.The
standard. The values given in parentheses after SI units are
end point is indicated by a dead stop electrometric titration
provided for information only and are not considered standard.
apparatus when the presence of free bromine causes a sudden
1.4 This standard does not purport to address all of the
change in the electrical conductivity of the system.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety, health, and environmental practices and deter-
5.1 This test method provides a measure of trace amounts of
mine the applicability of regulatory limitations prior to use.
unsaturated hydrocarbons in petroleum distillates boiling up to
1.5 This international standard was developed in accor-
288 °C (550 °F).An estimate of the quantity of these materials
dance with internationally recognized principles on standard-
is useful in assessing the suitability of the lighter fractions for
ization established in the Decision on Principles for the
use as reaction solvents.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
6. Apparatus
Barriers to Trade (TBT) Committee.
6.1 Electrometric End Point Titration Apparatus—Any ap-
paratus designed to perform titrations to pre-set end points (see
1
Note 4) may be used in conjunction with a high-resistance
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of
Subcommittee D02.06 on Analysis of Liquid Fuels and Lubricants.
Current edition approved May 1, 2020. Published June 2020. Originally
2
approved in 1968. Last previous edition approved in 2018 as D2710 – 09 (2018). For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/D2710-20. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
In the IP, this test method is under the jurisdiction of the Standardization Standards volume information, refer to the standard’s Document Summary page on
Committee. 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
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D271
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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.
Designation: D2710 − 09 (Reapproved 2018) D2710 − 20
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 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 given in parentheses after SI units are provided for
information only and are not considered standard.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of Subcommittee
D02.06 on Analysis of Liquid Fuels and Lubricants.
Current edition approved Dec. 1, 2018May 1, 2020. Published December 2018June 2020. Originally approved in 1968. Last previous edition approved in 20132018 as
D2710 – 09 (2013).(2018). DOI: 10.1520/D2710-09R18.10.1520/D2710-20.
In the IP, this test method is under the jurisdiction of the Standardization Committee.
*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 − 20
2. Referenced Documents
2
2.1 ASTM Standards:
D1159 Test Method for Bromine Numbers of Petroleum Distillates and Commercial Aliphatic Olefins by Electrometric Titration
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 Definitions:
3.1.1 bromine index, n—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.
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 these materials is useful in assessing the suitability of the lighter fractions for use
as reaction solvents.
6. Apparatus
6.1 Electrometric End Point Titration Apparatus—Any apparatus designed to perform titrations to pre-set end points (see Note
4) may be used in conjunction with a high-resistance polarizing current supply capable of maintain
...
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