ASTM D6919-17

Standard Test Method for Determination of Dissolved Alkali and Alkaline Earth Cations and Ammonium in Water and Wastewater by Ion Chromatography

SIGNIFICANCE AND USE
5.1 This test method is applicable to the simultaneous determination of dissolved alkali and alkaline earth cations and ammonium in water and wastewaters. Alkali and alkaline earth cations are traditionally determined by using spectroscopic techniques, such as AAS or ICP; whereas ammonium can be measured by using a variety of wet chemical methods, including colorimetry, ammonia-selective electrode, and titrimetry. However, ion chromatography provides a relatively straightforward method for the simultaneous determination of cations, such as lithium, sodium, potassium, calcium, magnesium, and ammonium, in fewer than 20–30 min.
SCOPE
1.1 This test method is valid for the simultaneous determination of the inorganic alkali and alkaline earth cations, lithium, sodium, potassium, magnesium, and calcium, as well as the ammonium cation in reagent water, drinking water, and wastewaters by suppressed and nonsuppressed ion chromatography.  
1.2 The anticipated range of the test method is 0.05–200 mg/L. The specific concentration ranges tested for this test method for each cation were as follows (measured in mg/L):    
Lithium  
0.4–10.0  
Sodium  
4.0–40.0  
Ammonium  
0.4–10.0  
Potassium  
1.2–20.0  
Magnesium  
2.4–20.0  
Calcium  
4.0–40.0  
1.2.1 The upper limits may be extended by appropriate dilution or by the use of a smaller injection volume. In some cases, using a larger injection loop may extend the lower limits. It is the responsibility of the user to ensure the validity of this test method for concentrations if the range is extended.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 It is the user’s responsibility to ensure the validity of these test methods for waters of untested matrices.  
1.5 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 hazards statements specific to this test method, see 8.3.  
1.6 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: 31-May-2017
• ICS: 13.060.50 - Examination of water for chemical substances
• Technical Committee: D19 - Water
• Drafting Committee: D19.05 - Inorganic Constituents in Water

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: D6919 − 17
Standard Test Method for
Determination of Dissolved Alkali and Alkaline Earth
Cations and Ammonium in Water and Wastewater by Ion
1
Chromatography
This standard is issued under the fixed designation D6919; 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* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This test method is valid for the simultaneous determi-
mendations issued by the World Trade Organization Technical
nation of the inorganic alkali and alkaline earth cations,
Barriers to Trade (TBT) Committee.
lithium, sodium, potassium, magnesium, and calcium, as well
as the ammonium cation in reagent water, drinking water, and
2. Referenced Documents
wastewaters by suppressed and nonsuppressed ion chromatog-
2
2.1 ASTM Standards:
raphy.
D1129Terminology Relating to Water
1.2 The anticipated range of the test method is 0.05–200
D1193Specification for Reagent Water
mg/L. The specific concentration ranges tested for this test
D2777Practice for Determination of Precision and Bias of
method for each cation were as follows (measured in mg/L):
Applicable Test Methods of Committee D19 on Water
Lithium 0.4–10.0
D3370Practices for Sampling Water from Closed Conduits
Sodium 4.0–40.0
D3856Guide for Management Systems in Laboratories
Ammonium 0.4–10.0
Potassium 1.2–20.0
Engaged in Analysis of Water
Magnesium 2.4–20.0
D4210Practice for Intralaboratory Quality Control Proce-
Calcium 4.0–40.0
dures and a Discussion on Reporting Low-Level Data
1.2.1 The upper limits may be extended by appropriate 3
(Withdrawn 2002)
dilution or by the use of a smaller injection volume. In some
D5810Guide for Spiking into Aqueous Samples
cases,usingalargerinjectionloopmayextendthelowerlimits.
D5847Practice for Writing Quality Control Specifications
It is the responsibility of the user to ensure the validity of this
for Standard Test Methods for Water Analysis
test method for concentrations if the range is extended.
D5905Practice for the Preparation of SubstituteWastewater
1.3 The values stated in SI units are to be regarded as
3. Terminology
standard. No other units of measurement are included in this
standard.
3.1 Definitions:
3.1.1 For definitions of terms used in this standard, refer to
1.4 It is the user’s responsibility to ensure the validity of
Terminology D1129.
these test methods for waters of untested matrices.
3.2 Definitions of Terms Specific to This Standard:
1.5 This standard does not purport to address all of the
3.2.1 continuing calibration blank, n—asolutioncontaining
safety concerns, if any, associated with its use. It is the
no analytes (of interest) which is used to verify blank response
responsibility of the user of this standard to establish appro-
and freedom from carryover.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For hazards
3.2.2 continuing calibration verification, n—a solution (or
statements specific to this test method, see 8.3.
setofsolutions)ofknownconcentrationusedtoverifyfreedom
1.6 This international standard was developed in accor-
fromexcessiveinstrumentaldrift;theconcentrationistocover
dance with internationally recognized principles on standard-
the range of calibration curve.
1 2
This test method is under the jurisdiction ofASTM Committee D19 on Water For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
in Water. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2017. Published June 2017. Originally the ASTM website.
3
approved in 2003. Last previous edition approved in 2009 as D6919–09. DOI: The last approved version of this historical standard is referenced on
10.1520/D6919-17. 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

---------------------- Page: 1 ----------------------
D6919 − 17
4. Summary of Test Method 6.1.1 High concentrations of analyte cations can interfere
with the determination of low concentrations of other analyte
4.1 Inorganic cations and the ammonium cation, hereafter
cationswit
...

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: D6919 − 09 D6919 − 17
Standard Test Method for
Determination of Dissolved Alkali and Alkaline Earth
Cations and Ammonium in Water and Wastewater by Ion
1
Chromatography
This standard is issued under the fixed designation D6919; 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 valid for the simultaneous determination of the inorganic alkali and alkaline earth cations, lithium,
sodium, potassium, magnesium, and calcium, as well as the ammonium cation in reagent water, drinking water, and wastewaters
by suppressed and nonsuppressed ion chromatography.
1.2 The anticipated range of the test method is 0.05–200 mg/L. The specific concentration ranges tested for this test method for
each cation were as follows (measured in mg/L):
Lithium 0.4–10.0
Sodium 4.0–40.0
Ammonium 0.4–10.0
Potassium 1.2–20.0
Magnesium 2.4–20.0
Calcium 4.0–40.0
1.2.1 The upper limits may be extended by appropriate dilution or by the use of a smaller injection volume. In some cases, using
a larger injection loop may extend the lower limits. It is the responsibility of the user to ensure the validity of this test method for
concentrations if the range is extended.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 It is the user’suser’s responsibility to ensure the validity of these test methods for waters of untested matrices.
1.5 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 hazards statements specific to this test method, see 8.3.
1.6 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:
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3370 Practices for Sampling Water from Closed Conduits
D3856 Guide for Management Systems in Laboratories Engaged in Analysis of Water
D4210 Practice for Intralaboratory Quality Control Procedures and a Discussion on Reporting Low-Level Data (Withdrawn
3
2002)
D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
1
This test method is under the jurisdiction of ASTM Committee D19 on Water and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents in Water.
Current edition approved May 15, 2009June 1, 2017. Published May 2009June 2017. Originally approved in 2003. Last previous edition approved in 20032009 as
D6919 – 03.D6919 – 09. DOI: 10.1520/D6919-09.10.1520/D6919-17.
2
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.
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

---------------------- Page: 1 ----------------------
D6919 − 17
D5905 Practice for the Preparation of Substitute Wastewater
3. Terminology
3.1 Definitions—Definitions: For definitions of terms used in this test method, refer to Terminology D1129.
3.1.1 For definitions of terms used in this standard, refer to Terminology D1129.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 continuing calibration blank, n—a solution containing no analytes (of interest) which is used to verify blank response and
freedom from carryover.
3.2.2 continuing calibration verification, n—a solution (or set of solutions) of known concentration used to verify freedom fr
...