ASTM D3920-12
(Test Method)Standard Test Method for Strontium in Water
Standard Test Method for Strontium in Water
SIGNIFICANCE AND USE
5.1 Although most potable supplies contain little strontium, some well waters in the midwestern part of the United States have levels as high as 39 mg/L.3
5.2 This test method affords a reliable means of accurately determining strontium and correcting calcium results obtained by the methods cited in 6.2.
SCOPE
1.1 This test method covers the determination of dissolved and total recoverable strontium in water and wastewater by atomic absorption spectroscopy.
1.2 The test method is applicable in the range from 0.1 to 1 mg/L of strontium. The range may be extended by dilution of the original sample.
1.3 Round-robin data were obtained in natural and reagent water matrices. It is the user's responsibility to ensure the validity of the test method for waters of untested matrices.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are mathematical conversions and may not be exact equivalents; therefore, each system shall be used independently of the other.
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. Specific precautionary statements are given in 8.4 and 8.9.
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Designation: D3920 − 12
Standard Test Method for
1
Strontium in Water
This standard is issued under the fixed designation D3920; 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* D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications
1.1 This test method covers the determination of dissolved
for Standard Test Methods for Water Analysis
and total recoverable strontium in water and wastewater by
atomic absorption spectroscopy.
3. Terminology
1.2 The test method is applicable in the range from 0.1 to 1
3.1 Definitions—For definitions of terms used in this test
mg/L of strontium. The range may be extended by dilution of
method, refer to Terminology D1129.
the original sample.
3.2 Definitions of Terms Specific to This Standard:
1.3 Round-robin data were obtained in natural and reagent
3.2.1 total recoverable strontium, n—an arbitrary analytical
water matrices. It is the user’s responsibility to ensure the
termrelatingtotheformsofstrontiumthataredeterminableby
validity of the test method for waters of untested matrices.
the digestion procedure described in this test method.
1.4 The values stated in either SI units or inch-pound units
3.2.2 laboratory control sample, n—a solution with a certi-
are to be regarded separately as standard. The values stated in
fied concentration of the strontium.
each system are mathematical conversions and may not be
4. Summary of Test Method
exact equivalents; therefore, each system shall be used inde-
pendently of the other.
4.1 Strontium is determined by atomic absorption spectro-
photometry.Thesampleisaspiratedintoanair-acetyleneflame
1.5 This standard does not purport to address all of the
following the addition of lanthanum chloride/potassium chlo-
safety concerns, if any, associated with its use. It is the
ride solution. Samples containing particulate matter that may
responsibility of the user of this standard to establish appro-
clogtheaspiratorcapillaryorburner,thusproducinginaccurate
priate safety and health practices and determine the applica-
results, are filtered through a 0.45-µm membrane filter prior to
bility of regulatory limitations prior to use. Specific precau-
testing.
tionary statements are given in 8.4 and 8.9.
5. Significance and Use
2. Referenced Documents
2
5.1 Although most potable supplies contain little strontium,
2.1 ASTM Standards:
some well waters in the midwestern part of the United States
D1129 Terminology Relating to Water
3
have levels as high as 39 mg/L.
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of
5.2 This test method affords a reliable means of accurately
Applicable Test Methods of Committee D19 on Water
determining strontium and correcting calcium results obtained
D3370 Practices for Sampling Water from Closed Conduits
by the methods cited in 6.2.
D4691 Practice for Measuring Elements in Water by Flame
6. Interferences
Atomic Absorption Spectrophotometry
D4841 Practice for Estimation of Holding Time for Water
6.1 Chemical interference caused by silicon, aluminum, and
Samples Containing Organic and Inorganic Constituents
phosphate is controlled by adding lanthanum chloride. Potas-
sium chloride is added to suppress the ionization of strontium.
1
This test method is under the jurisdiction of ASTM Committee D19 on Water NOTE1—Anitrousoxide-acetyleneflamehasbeenusedsuccessfullyby
and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
some to remove chemical interferences.
in Water.
6.2 Strontium chemically resembles calcium and causes a
Current edition approved Sept. 1, 2012. Published September 2012. Originally
ɛ1
approved in 1980. Last previous edition approved in 2007 as D3920 – 02 (2007) . positive error in gravimetric and titrimetric methods for cal-
DOI: 10.1520/D3920-12.
cium determination.
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
3
Standards volume information, refer to the standard’s Document Summary page on Standard Method for the Examination of Water and Wastewater, 14th Ed.
the ASTM website. American Public Health Assn., Washington, DC 20005.
*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 ----------------------
D3920 − 12
7. Apparatus 8.8 Oxidant—Air that has been cleaned and dried through a
suitable filter to remove oil, water, and ot
...
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.
´1
Designation: D3920 − 02 (Reapproved 2007) D3920 − 12
Standard Test Method for
1
Strontium in Water
This standard is issued under the fixed designation D3920; 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
ε NOTE—Editorial changes were made throughout in September 2007.
1. Scope Scope*
1.1 This test method covers the determination of dissolved and total recoverable strontium in water and wastewater by atomic
absorption spectroscopy.
1.2 The test method is applicable in the range from 0.1 to 1 mg/L of strontium. The range may be extended by dilution of the
original sample.
1.3 Round-robin data were obtained in natural and reagent water matrices. It is the user’s responsibility to ensure the validity
of the test method for waters of untested matrices.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are mathematical conversions and may not be exact equivalents; therefore, each system shall be used independently of the
other.
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. Specific precautionary statements are given in 8.4 and 8.9.
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
D4691 Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry
D4841 Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents
D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
3. Terminology
3.1 Definitions: For definitions of terms used in this test method, refer to Terminology D1129.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 total recoverable strontium, n—an arbitrary analytical term relating to the forms of strontium that are determinable by the
digestion procedure described in this test method.
3.2.2 laboratory control sample, n—a solution with a certified concentration of the strontium.
4. Summary of Test Method
4.1 Strontium is determined by atomic absorption spectrophotometry. The sample is aspirated into an air-acetylene flame
following the addition of lanthanum chloride/potassium chloride solution. Samples containing particulate matter that may clog the
aspirator capillary or burner, thus producing inaccurate results, are filtered through a 0.45-μm membrane filter prior to testing.
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 Aug. 1, 2007Sept. 1, 2012. Published September 2007 September 2012. Originally approved in 1980. Last previous edition approved in 2002
as D3920 – 02.D3920 – 02(2007)E01. DOI: 10.1520/D3920–02R07E0110.1520/D3920–12
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. DOI: 10.1520/D3920-02R07E01.
*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 ----------------------
D3920 − 12
5. Significance and Use
5.1 Although most potable supplies contain little strontium, some well waters in the midwestern part of the United States have
3
levels as high as 39 mg/L.
5.2 This test method affords a reliable means of accurately determining strontium and correcting calcium results obtained by
the methods cited in 6.2.
6. Interferences
6.1 Chemical interference caused by silicon, aluminum, and phosphate is controlled by adding lanthanum chloride. Potassium
chloride is added to suppress the ionization of stron
...
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