ASTM E1787-16
(Test Method)Standard Test Method for Anions in Caustic Soda and Caustic Potash (Sodium Hydroxide and Potassium Hydroxide) by Ion Chromatography
Standard Test Method for Anions in Caustic Soda and Caustic Potash (Sodium Hydroxide and Potassium Hydroxide) by Ion Chromatography
SIGNIFICANCE AND USE
4.1 Anion impurities in caustic soda and caustic potash are monitored by manufacturers and users for quality control of the products. Anions of primary interest are chloride, chlorate, and sulfate. This test method has determined precision estimates only for these three impurities.
SCOPE
1.1 This test method covers the determination of anionic impurities in 50 % caustic soda (sodium hydroxide) and 50 % caustic potash (potassium hydroxide) solutions using ion chromatography (IC). Anions that can be determined at concentrations of approximately 0.1 to 1000 ug/g (ppm) include: bromide, chlorate, chloride, fluoride, nitrate, phosphate, and sulfate.
1.2 By varying the sample size, this test method can be used for anhydrous caustic soda and caustic potash products, as well as other concentrations of liquid products.
1.3 This test method is not intended to be used to quantify chloride in caustic soda where the sodium chloride concentration is approximately 1 %. For the most accurate determinations, it is recommended that high concentrations of chloride be analyzed using a potentiometric titration procedure, such as the one described in Test Methods E291.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.5 Review the current appropriate Safety Data Sheets (SDS) for detailed information concerning toxicity, first aid procedures, and safety precautions.
1.6 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 8.
General Information
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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: E1787 − 16
Standard Test Method for
Anions in Caustic Soda and Caustic Potash (Sodium
Hydroxide and Potassium Hydroxide) by Ion
1
Chromatography
This standard is issued under the fixed designation E1787; 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.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This test method covers the determination of anionic
impurities in 50% caustic soda (sodium hydroxide) and 50%
2. Referenced Documents
caustic potash (potassium hydroxide) solutions using ion
2
2.1 ASTM Standards:
chromatography (IC). Anions that can be determined at con-
D1193Specification for Reagent Water
centrations of approximately 0.1 to 1000 ug/g (ppm) include:
E180Practice for Determining the Precision of ASTM
bromide, chlorate, chloride, fluoride, nitrate, phosphate, and
Methods for Analysis and Testing of Industrial and Spe-
sulfate.
3
cialty Chemicals (Withdrawn 2009)
1.2 Byvaryingthesamplesize,thistestmethodcanbeused
E291Test Methods for Chemical Analysis of Caustic Soda
foranhydrouscausticsodaandcausticpotashproducts,aswell
and Caustic Potash (Sodium Hydroxide and Potassium
as other concentrations of liquid products.
Hydroxide)
1.3 This test method is not intended to be used to quantify
3. Summary of Test Method
chloride in caustic soda where the sodium chloride concentra-
tion is approximately 1 %. For the most accurate
3.1 Bromide, chlorate, chloride, fluoride, nitrate, phosphate
determinations, it is recommended that high concentrations of
and sulfate are measured in NaOH or KOH by ion chromatog-
chloridebeanalyzedusingapotentiometrictitrationprocedure,
raphy. The sample solution is diluted and injected onto a
such as the one described in Test Methods E291.
sample loop of an automated neutralization module. The
sample in the loop is pumped to a suppressor device (electro-
1.4 The values stated in SI units are to be regarded as
lyticallyorchemicallyregenerated)toneutralizethehydroxide
standard. The values given in parentheses are for information
ions. Anionic constituents of the neutralized sample are con-
only.
centrated on an anion concentrator column. After the concen-
1.5 Review the current appropriate Safety Data Sheets
tration they are separated into individual elution bands in the
(SDS) for detailed information concerning toxicity, first aid
eluent on a separator column.The conductivity of the eluent is
procedures, and safety precautions.
reduced with an anion suppression device, and the anions of
1.6 This standard does not purport to address all of the
interestaredetectedusingaconductivitydetector.Quantitation
safety concerns, if any, associated with its use. It is the
of the anions in the sample solution is achieved by calibrating
responsibility of the user of this standard to establish appro-
the IC with a series of standards containing known amounts of
priate safety, health, and environmental practices and deter-
the anions. These standards are also passed through the
mine the applicability of regulatory limitations prior to use.
neutralization device.
Specific hazards statements are given in Section 8.
4. Significance and Use
1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.1 Anion impurities in caustic soda and caustic potash are
ization established in the Decision on Principles for the
monitoredbymanufacturersandusersforqualitycontrolofthe
Development of International Standards, Guides and Recom-
products.Anionsofprimaryinterestarechloride,chlorate,and
1 2
This test method is under the jurisdiction of ASTM Committee D16 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
bility of Subcommittee D16.12 on Caustics and Peroxides. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 15, 2016. Published May 2016. Originally the ASTM website.
3
approved in 1996. Last previous edition approved in 2008 as E1787– 08. DOI: The last approved version of this historical standard is referenced on
10.1520/E1787-16. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoh
...
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: E1787 − 08 E1787 − 16
Standard Test Method for
Anions in Caustic Soda and Caustic Potash (Sodium
Hydroxide and Potassium Hydroxide) by Ion
1
Chromatography
This standard is issued under the fixed designation E1787; 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 determination of anionic impurities in 50 % caustic soda (sodium hydroxide) and 50 % caustic
potash (potassium hydroxide) solutions using ion chromatography (IC). Anions that can be determined at concentrations of
approximately 0.1–1000 0.1 to 1000 ug/g (ppm) include: bromide, chlorate, chloride, fluoride, nitrate, phosphate, and sulfate.
1.2 By varying the sample size, this test method can be used for anhydrous caustic soda and caustic potash products, as well
as other concentrations of liquid products.
1.3 This test method is not intended to be used to quantify chloride in caustic soda where the sodium chloride concentration
is approximately 1 %. For the most accurate determinations, it is recommended that high concentrations of chloride be analyzed
using a potentiometric titration procedure, such as the one described in Test Methods E291.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.5 Review the current appropriate Material Safety Data Sheets (MSDS)(SDS) for detailed information concerning toxicity, first
aid procedures, and safety precautions.
1.6 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 8.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
3
(Withdrawn 2009)
E291 Test Methods for Chemical Analysis of Caustic Soda and Caustic Potash (Sodium Hydroxide and Potassium Hydroxide)
3. Summary of Test Method
3.1 Bromide, chlorate, chloride, fluoride, nitrate, phosphate and sulfate are measured in NaOH or KOH by ion chromatography.
The sample solution is diluted and injected onto a sample loop of an automated neutralization module. The sample in the loop is
pumped to a suppression device which uses electrolysis suppressor device (electrolytically or chemically regenerated) to neutralize
the hydroxide ions. The sample then is circulated through this device several times until it is completely neutralized. Anionic
constituents of the neutralized sample are concentrated on an anion concentrator column. After the concentration they are separated
into individual elution bands in the eluent on a separator column. The conductivity of the eluent is reduced with an anion
suppression device, and the anions of interest are detected using a conductivity detector. Quantitation of the anions in the sample
solution is achieved by calibrating the IC with a series of standards containing known amounts of the anions. These standards are
also passed through the neutralization device.
1
This test method is under the jurisdiction of ASTM Committee E15 on Industrial and Specialty Chemicals and is the direct responsibility of Subcommittee E15.01 on
General Standards.
Current edition approved April 1, 2008May 15, 2016. Published May 2008May 2016. Originally publishedapproved in 1996. Last previous edition approved in 20022008
as E1787-02.-08. DOI: 10.1520/E1787-08.10.1520/E1787-16.
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
The last approved version of this historical standard is referenced on www.astm.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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E1787 − 16
4. Significance and Use
4.1 Anion impurities in caustic soda and caustic po
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