ASTM E1786-17a
(Test Method)Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine by On-Line Infrared Spectrophotometry
Standard Test Method for Determination of Low Levels of Water in Liquid Chlorine by On-Line Infrared Spectrophotometry
SIGNIFICANCE AND USE
4.1 Trace amounts of water may be detrimental to the use of chlorine in some applications. The amount of water in the chlorine must be known to prevent problems during its use.
SCOPE
1.1 This test method is designed for the on-line determination of the content of water in liquid chlorine in the concentration range of 0.5 to 15 mg/kg (ppm).
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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 and Note 3.
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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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: E1786 − 17a
Standard Test Method for
Determination of Low Levels of Water in Liquid Chlorine by
1
On-Line Infrared Spectrophotometry
This standard is issued under the fixed designation E1786; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
3
1. Scope* 2.2 Federal Standards:
49 CFR 173Code of Federal RegulationsTitle 49Transpor-
1.1 This test method is designed for the on-line determina-
tation:Shippers’GeneralRequirementsforShipmentsand
tion of the content of water in liquid chlorine in the concen-
Packaging, including the following sections:
tration range of 0.5 to 15 mg/kg (ppm).
173.304Charging of Cylinders with Liquefied Compressed
1.2 The values stated in SI units are to be regarded as
Gas
standard. The values given in parentheses are for information
173.314Requirements for Compressed Gases in Tank Cars
only.
173.315Compressed Gases in Cargo Tanks and Portable
1.3 Review the current Safety Data Sheets (SDS) for de- Tank Containers
4
2.3 Other Document:
tailedinformationconcerningtoxicity,firstaidprocedures,and
safety precautions. Chlorine Institute Pamphlet No. 1— Chlorine Basics
1.4 This standard does not purport to address all of the
3. Summary of Test Method
safety concerns, if any, associated with its use. It is the
3.1 Liquid chlorine continuously flows through a special
responsibility of the user of this standard to establish appro-
infrared cell where it is maintained as a liquid under its own
priate safety, health, and environmental practices and deter-
pressure. A process infrared spectrometer scans from 400 to
mine the applicability of regulatory limitations prior to use.
4400 wavenumbers of the infrared transmission spectrum of
Specific hazards statements are given in Section 7 and Note 3.
liquid chlorine. This spectrum then is ratioed to one obtained
1.5 This international standard was developed in accor-
from the nitrogen-filled infrared cell previously. The ratioed
dance with internationally recognized principles on standard-
spectrumisconvertedtoabsorbance,andthenetabsorbanceof
ization established in the Decision on Principles for the
water band at 1596 wavenumbers, relative to a reference at
Development of International Standards, Guides and Recom-
1663 wavenumbers, is determined.
mendations issued by the World Trade Organization Technical
3.2 The amount of water corresponding to this net absor-
Barriers to Trade (TBT) Committee.
banceisdeterminedfromacalibrationcurvepreparedfromthe
2. Referenced Documents
infrared absorbencies of standards which contain concentra-
2
tions of water in liquid chlorine. These standards are prepared
2.1 ASTM Standards:
from manual samples of liquid chlorine in tantalum cylinders.
D1193Specification for Reagent Water
Sample from each cylinder is introduced into a calibration
D6809Guide for Quality Control and Quality Assurance
infraredcellandmaintainedasaliquidunderitsownpressure.
Procedures for Aromatic Hydrocarbons and Related Ma-
terials
4. Significance and Use
E806TestMethodforCarbonTetrachlorideandChloroform
4.1 Traceamountsofwatermaybedetrimentaltotheuseof
in Liquid Chlorine by Direct Injection (Gas Chromato-
chlorine in some applications. The amount of water in the
graphic Procedure)
chlorine must be known to prevent problems during its use.
5. Apparatus
1
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
5.1 Process Infrared Spectrometer, capable of measure-
bility of Subcommittee D16.13 on Chlorine.
ments in the 1600 wavenumber region. An FTIR with four
CurrenteditionapprovedJuly1,2017.PublishedJuly2017.Originallyapproved
in 1996. Last previous edition approved in 2017 as E1786–17. DOI: 10.1520/
3
E1786-17a. Code of Federal Regulations,AvailablefromU.S.GovernmentPrintingOffice,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 0001, http://www.access.gpo.gov.
4
Standards volume information, refer to the standard’s Document Summary page on Available from The Chlorine Institute, Inc., 1300 Wilson Blvd., Suite 525,
the ASTM website. Arlington, VA 22209, https://www.chlorineinstitute.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C70
...
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: E1786 − 17 E1786 − 17a
Standard Test Method for
Determination of Low Levels of Water in Liquid Chlorine by
1
On-Line Infrared Spectrophotometry
This standard is issued under the fixed designation E1786; 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 is designed for the on-line determination of the content of water in liquid chlorine in the concentration
range of 0.5 to 15 mg/kg (ppm).
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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 and Note 3.
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
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E806 Test Method for Carbon Tetrachloride and Chloroform in Liquid Chlorine by Direct Injection (Gas Chromatographic
Procedure)
3
2.2 Federal Standards:
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
4
2.3 Other Document:
Chlorine Institute Pamphlet No. 1 — Chlorine Basics
3. Summary of Test Method
3.1 Liquid chlorine continuously flows through a special infrared cell where it is maintained as a liquid under its own pressure.
A process infrared spectrometer scans from 400 to 4400 wavenumbers of the infrared transmission spectrum of liquid chlorine.
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 1996. Last previous edition approved in 20082017 as
E1786 – 08.E1786 – 17. DOI: 10.1520/E1786-17.10.1520/E1786-17a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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 the ASTM website.
3
Code of Federal Regulations, Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001,
http://www.access.gpo.gov.
4
Available from The Chlorine Institute, Inc., 1300 Wilson Blvd., Suite 525, Arlington, VA 22209, https://www.chlorineinstitute.org.
*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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E1786 − 17a
This spectrum then is ratioed to one obtained from the nitrogen-filled infrared cell previously. The ratioed spectrum is converted
to absorbance, and the net absorbance of water band at 1596 wavenumbers, relative to a reference at 1663 wavenumbers, is
determined.
3.2 The amount of water corresponding to this net absorbance is determined from a calibration curve prepared from the infrared
absorbencies of standards which contain concentrations of water in liquid chlorine. These standards are prepared from manual
samples of liquid chlorine in tantalum cylinders. Sample from each cylinder is introduce
...
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