ASTM E1746-17a

Standard Test Method for Sampling and Analysis of Liquid Chlorine for Gaseous Impurities

SIGNIFICANCE AND USE
4.1 It is very difficult to exclude sample contamination by ambient air during the process of sampling. The levels of atmospheric contamination caused by poor sampling methods are often equal to or larger than the levels of the gaseous impurities present in the chlorine. This results in markedly elevated levels of detected impurities. As specifications become tighter, it becomes more important to measure the gaseous impurity levels in liquid chlorine correctly.  
4.2 Additional problems are experienced in the sampling of liquefied gases for the gaseous impurities. The gaseous impurities reach an equilibrium between the liquid phase and vapor phase in a sample bomb. The quantity of gases measured in any particular sample containing both liquid and vapor will be a function of the amount of vapor space in the sample bomb. This test method avoids the presence of liquid in the sample bomb.
SCOPE
1.1 This test method covers sampling and analysis of liquid chlorine for the determination of oxygen (200 to 400 μg/g), nitrogen (400 to 800 μg/g), and carbon dioxide (800 to 1000 ppm) content at levels normally seen in liquid chlorine. Hydrogen and carbon monoxide concentrations in liquid chlorine are typically at or below the detection limit of this test method.  
Note 1: The minimum detection limit of hydrogen using a 1 cm3 gas sample and argon carrier gas is 100 to 200 μg/g.2 The detection limit for the other components is significantly lower.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 Review the current Safety Data Sheets (SDS) for detailed information concerning toxicity, first aid procedures, and safety precautions.  
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. Specific hazards statements are given in Section 7.  
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.

General Information

• Status: Published
• Publication Date: 30-Jun-2017
• ICS: 71.060.10 - Chemical elements
• Technical Committee: D16 - Aromatic, Industrial, Specialty and Related Chemicals
• Drafting Committee: D16.13 - Chlorine

Relations

• Refers: ASTM D6809-02(2016) - Standard Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
• Effective Date: 01-Nov-2016

Standards Content (Sample)

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: E1746 − 17a
Standard Test Method for
Sampling and Analysis of Liquid Chlorine for Gaseous
1
Impurities
This standard is issued under the fixed designation E1746; 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
3
2.1 ASTM Standards:
1.1 This test method covers sampling and analysis of liquid
D6809 Guide for Quality Control and Quality Assurance
chlorine for the determination of oxygen (200 to 400 µg/g),
Procedures for Aromatic Hydrocarbons and Related Ma-
nitrogen (400 to 800 µg/g), and carbon dioxide (800 to 1000
terials
ppm) content at levels normally seen in liquid chlorine.
4
2.2 Code of Federal Regulations:
Hydrogen and carbon monoxide concentrations in liquid chlo-
49 CFR 173, Code of Federal Regulations Title 49, Trans-
rine are typically at or below the detection limit of this test
portation: Shippers’General Requirements for Shipments
method.
and Packaging, including the following sections:
3
NOTE 1—The minimum detection limit of hydrogen usinga1cm gas
173.304 Charging of Cylinders with Liquefied Compressed
2
sample and argon carrier gas is 100 to 200 µg/g. The detection limit for
Gas
the other components is significantly lower.
173.314 Requirements for Compressed Gases in Tank Cars
1.2 The values stated in SI units are to be regarded as
173.315 Compressed Gases in Cargo Tanks and Portable
standard. No other units of measurement are included in this
Tank Containers
standard.
2.3 Other Document:
5
Chlorine Institute Pamphlet No. 1 Chlorine Basics
1.3 Review the current Safety Data Sheets (SDS) for de-
tailed information concerning toxicity, first aid procedures, and
3. Summary of Test Method
safety precautions.
3.1 Asampleofliquidchlorineistrappedinasamplingtube
1.4 This standard does not purport to address all of the
and vaporized into a steel bomb. The vaporized chlorine in the
safety concerns, if any, associated with its use. It is the
steel bomb is introduced into a gas chromatograph by a gas
3
responsibility of the user of this standard to establish appro-
sampling loop (1 cm ) using a ten-port gas sampling and
6
priate safety, health, and environmental practices and deter-
switching valve. The separations are made on a Porapak Q
mine the applicability of regulatory limitations prior to use.
column and on a 5Amolecular sieve column whose lengths are
Specific hazards statements are given in Section 7.
such that the peaks do not overlap.
1.5 This international standard was developed in accor-
3.2 Any component that co-elutes with the components of
dance with internationally recognized principles on standard-
interest may interfere with this analysis.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 4. Significance and Use
mendations issued by the World Trade Organization Technical
4.1 It is very difficult to exclude sample contamination by
Barriers to Trade (TBT) Committee.
ambient air during the process of sampling. The levels of
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This test method is under the jurisdiction of ASTM Committee D16 on contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi- Standards volume information, refer to the standard’s Document Summary page on
bility of Subcommittee D16.13 on Chlorine. the ASTM website.
4
Current edition approved July 1, 2017. Published July 2017. Originally approved Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
in 1995. Last previous edition approved in 2017 as E1746 – 17. DOI: 10.1520/ Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
5
E1746-17a. Available from The Chlorine Institute, Inc., 1300 Wilson Blvd., Suite 525,
2
Thompson, B., Fundamentals of Gas Chromatography, Varian Instruments
Arlington, VA 22209.
6
Division, Sunnyvale, CA, p. 73. Porapak is a trademark of Waters Associates, Inc.
*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 ----------------------
E1746 − 17a
FIG. 1 Chlorine Impurity Analysis System Flow Diagram
atmospheric contamination caused by poor sampling methods 5. Apparatus
are often equal to or larger than the levels of the ga
...

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: E1746 − 17 E1746 − 17a
Standard Test Method for
Sampling and Analysis of Liquid Chlorine for Gaseous
1
Impurities
This standard is issued under the fixed designation E1746; 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 sampling and analysis of liquid chlorine for the determination of oxygen (200 to 400 μg/g), nitrogen
(400 to 800 μg/g), and carbon dioxide (800 to 1000 ppm) content at levels normally seen in liquid chlorine. Hydrogen and carbon
monoxide concentrations in liquid chlorine are typically at or below the detection limit of this test method.
3 2
NOTE 1—The minimum detection limit of hydrogen using a 1 cm gas sample and argon carrier gas is 100 to 200 μg/g. The detection limit for the
other components is significantly lower.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 Review the current Safety Data Sheets (SDS) for detailed information concerning toxicity, first aid procedures, and safety
precautions.
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. Specific hazards statements are given in Section 7.
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.
2. Referenced Documents
3
2.1 ASTM Standards:
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
4
2.2 Code of Federal Regulations:
49 CFR 173, Code of Federal Regulations Title 49, Transportation: Shippers’ General Requirements for Shipments and
Packaging, including the following sections:
173.304 Charging of Cylinders with Liquefied Compressed Gas
173.314 Requirements for Compressed Gases in Tank Cars
173.315 Compressed Gases in Cargo Tanks and Portable Tank Containers
2.3 Other Document:
5
Chlorine Institute Pamphlet No. 1 Chlorine Basics
3. Summary of Test Method
3.1 A sample of liquid chlorine is trapped in a sampling tube and vaporized into a steel bomb. The vaporized chlorine in the
3
steel bomb is introduced into a gas chromatograph by a gas sampling loop (1 cm ) using a ten-port gas sampling and switching
6
valve. The separations are made on a Porapak Q column and on a 5A molecular sieve column whose lengths are such that the
peaks do not overlap.
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons Aromatic, Industrial, Specialty and Related Chemicals and is the direct
responsibility of Subcommittee D16.16 on Industrial and Specialty Product Standards.
Current edition approved March 1, 2017July 1, 2017. Published March 2017July 2017. Originally approved in 1995. Last previous edition approved in 20082017 as E1746
– 08.17. DOI: 10.1520/E1746-17.10.1520/E1746-17a.
2
Thompson, B., Fundamentals of Gas Chromatography, Varian Instruments Division, Sunnyvale, CA, p. 73.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from DLA Document Services, Building 4/D, 700 Robbins Ave., Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
5
Available from The Chlorine Institute, Inc., 1300 Wilson Blvd., Suite 525, Arlington, VA 22209.
6
Porapak is a trademark of Waters Associates, Inc.
*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 ----------------------
E1746 − 17a
3.2 Any component that co-elutes with the components of interest may interfere with this analysis.
4. Significance and Use
4.1 It is very difficult to exclude sample contamination by ambient air during the
...