ASTM D5808-09a
(Test Method)Standard Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by Microcoulometry
Standard Test Method for Determining Chloride in Aromatic Hydrocarbons and Related Chemicals by Microcoulometry
SIGNIFICANCE AND USE
Organic as well as inorganic chlorine compounds can prove harmful to equipment and reactions in processes involving hydrocarbons.
Maximum chloride levels are often specified for process streams and for hydrocarbon products.
Organic chloride species are potentially damaging to refinery processes. Hydrochloric acid can be produced in hydrotreating or reforming reactors and this acid accumulates in condensing regions of the refinery.
SCOPE
1.1 This test method covers the organic chlorides in aromatic hydrocarbons, their derivatives, and related chemicals.
1.2 This test method is applicable to samples with chloride concentrations from 1 to 25 mg/kg.
1.3 This test method is preferred over Test Method D5194 for products, such as styrene, that are polymerized by the sodium biphenyl reagent.
1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.
1.5 Organic chloride values of samples containing inorganic chlorides will be biased high due to partial recovery of inorganic species during combustion. Interference from inorganic species can be reduced by water washing the sample before analysis. This does not apply to water soluble samples.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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. For specific hazard statements, see 7.3 and Section 9.
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Designation: D5808 − 09a
StandardTest Method for
Determining Chloride in Aromatic Hydrocarbons and
1
Related Chemicals by Microcoulometry
This standard is issued under the fixed designation D5808; 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* D1555M TestMethodforCalculationofVolumeandWeight
of Industrial Aromatic Hydrocarbons and Cyclohexane
1.1 This test method covers the organic chlorides in aro-
[Metric]
matic hydrocarbons, their derivatives, and related chemicals.
D3437 Practice for Sampling and Handling Liquid Cyclic
1.2 This test method is applicable to samples with chloride
Products
concentrations from 1 to 25 mg/kg.
D5194 Test Method for Trace Chloride in Liquid Aromatic
1.3 This test method is preferred over Test Method D5194 Hydrocarbons
D6809 Guide for Quality Control and Quality Assurance
for products, such as styrene, that are polymerized by the
sodium biphenyl reagent. Procedures for Aromatic Hydrocarbons and Related Ma-
terials
1.4 In determining the conformance of the test results using
E29 Practice for Using Significant Digits in Test Data to
this method to applicable specifications, results shall be
Determine Conformance with Specifications
rounded off in accordance with the rounding-off method of
E691 Practice for Conducting an Interlaboratory Study to
Practice E29.
Determine the Precision of a Test Method
1.5 Organic chloride values of samples containing inorganic
2.2 Other Document:
chlorides will be biased high due to partial recovery of
OSHA Regulations, 29CFR paragraphs 1910.1000 and
inorganic species during combustion. Interference from inor- 3
1910.1200
ganic species can be reduced by water washing the sample
before analysis. This does not apply to water soluble samples.
3. Terminology
1.6 The values stated in SI units are to be regarded as
3.1 Definitions:
standard. No other units of measurement are included in this
3.1.1 dehydration tube, n—chamber containing concen-
standard.
trated sulfuric acid that scrubs the effluent gases from combus-
1.7 This standard does not purport to address all of the tion to remove water vapor.
safety concerns, if any, associated with its use. It is the
3.1.2 oxidative pyrolysis, n—a process in which a sample is
responsibility of the user of this standard to establish appro-
combusted in an oxygen-rich atmosphere at high temperature
priate safety and health practices and determine the applica-
to break down the components of the sample into elemental
bility of regulatory limitations prior to use. For specific hazard
oxides.
statements, see 7.3 and Section 9.
3.1.3 recovery factor, n—an indication of the efficiency of
the measurement computed by dividing the measured value of
2. Referenced Documents
a standard by its theoretical value.
2
2.1 ASTM Standards:
3.1.4 reference sensor pair, n—detects changes in silver ion
D1193 Specification for Reagent Water
concentration.
3.1.5 test titration, n—a process that allows the coulometer
to set the endpoint and gain values to be used for sample
1
This test method is under the jurisdiction of ASTM Committee D16 on
analysis.
Aromatic Hydrocarbons and Related Chemicals is the direct responsibility of
Subcommittee D16.04 on Instrumental Analysis.
3.1.6 titration parameters, n—various instrumental condi-
Current edition approved Dec. 1, 2009. Published December 2009. Originally
tions that can be changed for different types of analysis.
approved in 1995. Last previous edition approved in 2009 as D5808 – 09. DOI:
10.1520/D5808-09A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Standards volume information, refer to the standard’s Document Summary page on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
the ASTM website. www.access.gpo.gov.
*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 ----------------------
D5808 − 09a
3.1.7 working electrode (generator electrode), n—an elec- (Warning—Excessive stirring speed will decouple the stirring
trode consisting of an anode and a cathode separated by a salt bar and cause it to rise in the titration cell and possibly damage
bridge; maintains a constant silver ion concentration. the electrodes. A slight vortex in the cell will be adequate.)
7.4 Microcoulometer, capable of measuring the potential of
4. Su
...
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:D5808–09 Designation:D5808–09a
Standard Test Method for
Determining Chloride in Aromatic Hydrocarbons and
1
Related Chemicals by Microcoulometry
This standard is issued under the fixed designation D5808; 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*
1.1 This test method covers the organic chlorides in aromatic hydrocarbons, their derivatives, and related chemicals.
1.2 This test method is applicable to samples with chloride concentrations from 1 to 25 mg/kg.
1.3 This test method is preferred over Test Method D5194 for products, such as styrene, that are polymerized by the sodium
biphenyl reagent.
1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded
off in accordance with the rounding-off method of Practice E29.
1.5 Organic chloride values of samples containing inorganic chlorides will be biased high due to partial recovery of inorganic
species during combustion. Interference from inorganic species can be reduced by water washing the sample before analysis. This
does not apply to water soluble samples.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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. For specific hazard statements, see 7.3 and Section 9.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D1555M Test Method for Calculation of Volume and Weight of Industrial Aromatic Hydrocarbons and Cyclohexane [Metric]
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D5194 Test Method for Trace Chloride in Liquid Aromatic Hydrocarbons
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
2.2 Other Document:
3
OSHA Regulations, 29CFR paragraphs 1910.1000 and 1910.1200
3. Terminology
3.1 Definitions:
3.1.1 dehydration tube, n—chamber containing concentrated sulfuric acid that scrubs the effluent gases from combustion to
remove water vapor.
3.1.2 oxidative pyrolysis, n—a process in which a sample is combusted in an oxygen-rich atmosphere at high temperature to
break down the components of the sample into elemental oxides.
3.1.3 recovery factor, n—an indication of the efficiency of the measurement computed by dividing the measured value of a
standard by its theoretical value.
3.1.4 reference sensor pair, n—detects changes in silver ion concentration.
3.1.5 test titration, n—a process that allows the coulometer to set the endpoint and gain values to be used for sample analysis.
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons and Related Chemicals is the direct responsibility of Subcommittee
D16.04 on Instrumental Analysis.
CurrenteditionapprovedJulyDec.1,2009.PublishedJulyDecember2009.Originallyapprovedin1995.Lastpreviouseditionapprovedin20032009asD5808 - 039.DOI:
10.1520/D5808-09A.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
www.access.gpo.gov.
*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 ----------------------
D5808–09a
3.1.6 titration parameterstitration parameters, n—various instrumental conditions that can be changed for different types of
analysis.
3.1.7 working electrode (generator electrode), n—an electrode consisting of an anode and a cathode separated by a salt bridge;
...
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