Designation: E1746 − 17aStandard Test Method forSampling and Analysis of Liquid Chlorine for GaseousImpurities 1This standard is issued under the f i xed designation E1746; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (´) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers sampling and analysis of liquidchlorine for the determination of oxygen (200 to 400 µg/g),nitrogen (400 to 800 µg/g), and carbon dioxide (800 to 1000ppm) content at levels normally seen in liquid chlorine.Hydrogen and carbon monoxide concentrations in liquid chlo-rine are typically at or below the detection limit of this testmethod.N OTE 1—The minimum detection limit of hydrogen using a 1 cm 3 gassample and argon carrier gas is 100 to 200 µg/g. 2 The detection limit forthe other components is signif i cantly lower.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 Review the current Safety Data Sheets (SDS) for de-tailed information concerning toxicity, f i rst aid procedures, andsafety precautions.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specif i c hazardsstatements are given in Section 7.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards: 3D6809 Guide for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terials2.2 Code of Federal Regulations: 449 CFR 173, Code of Federal Regulations Title 49, Trans-portation: Shippers’ General Requirements for Shipmentsand Packaging, including the following sections:173.304 Charging of Cylinders with Liquef i ed CompressedGas173.314 Requirements for Compressed Gases in Tank Cars173.315 Compressed Gases in Cargo Tanks and PortableTank Containers2.3 Other Document:Chlorine Institute Pamphlet No. 1 Chlorine Basics 53. Summary of Test Method3.1 Asample of liquid chlorine is trapped in a sampling tubeand vaporized into a steel bomb. The vaporized chlorine in thesteel bomb is introduced into a gas chromatograph by a gassampling loop (1 cm 3 ) using a ten-port gas sampling andswitching valve. The separations are made on a Porapak 6 Qcolumn and on a 5Amolecular sieve column whose lengths aresuch that the peaks do not overlap.3.2 Any component that co-elutes with the components ofinterest may interfere with this analysis.4. Signif i cance and Use4.1 It is very difficult to exclude sample contamination byambient air during the process of sampling. The levels of1 This test method is under the jurisdiction of ASTM Committee D16 onAromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-bility of Subcommittee D16.16 on Industrial and Specialty Product Standards.Current edition approved July 1, 2017. Published July 2017. Originally approvedin 1995. Last previous edition approved in 2017 as E1746 – 17. DOI: 10.1520/E1746-17a.2 Thompson, B., Fundamentals of Gas Chromatography, Varian InstrumentsDivision, Sunnyvale, CA, p. 73.3 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe 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 standardCopyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1 Copyright by ASTM Int'l (all rights reserved); Sat Oct 7 03:24:32 EDT 2017Downloaded/printed byUniversity of Edinburgh (University of Edinburgh) pursuant to License Agreement. No further reproductions authorized.
