ASTM D3920-92(1996)

Standard Test Method for Strontium in Water

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 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.

General Information

• Status: Historical
• Publication Date: 09-May-2002
• ICS: 13.060.50 - Examination of water for chemical substances
• Technical Committee: D19 - Water
• Drafting Committee: D19.05 - Inorganic Constituents in Water

Relations

• Replaced By: ASTM D3920-02 - Standard Test Method for Strontium in Water
• Effective Date: 10-May-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3920 – 92 (Reapproved 1996)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
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Strontium in Water
This standard is issued under the fixed designation D 3920; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope following the addition of lanthanum chloride/potassium chlo-
ride solution. Samples containing particulate matter that may
1.1 This test method covers the determination of dissolved
clog the aspirator capillary or burner, thus producing inaccurate
and total recoverable strontium in water and wastewater by
results, are filtered through a 0.45-μm membrane filter prior to
atomic absorption spectroscopy.
1.2 The test method is applicable in the range from 0.1 to 1 testing.
mg/L of strontium. The range may be extended by dilution of
the original sample.
5. Significance and Use
1.3 Round-robin data were obtained in natural and reagent
5.1 Although most potable supplies contain little strontium,
water matrices. It is the user’s responsibility to ensure the
some well waters in the midwestern part of the United States
validity of the test method for waters of untested matrices.
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have levels as high as 39 mg/L.
1.4 This standard does not purport to address all of the
5.2 This test method affords a reliable means of accurately
safety concerns, if any, associated with its use. It is the
determining strontium and correcting calcium results obtained
responsibility of the user of this standard to establish appro-
by the methods cited in 6.2.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in Note 4 and Note 5. 6. Interferences
6.1 Chemical interference caused by silicon, aluminum, and
2. Referenced Documents
phosphate is controlled by adding lanthanum chloride. Potas-
2.1 ASTM Standards:
sium chloride is added to suppress the ionization of strontium.
2
D 1129 Terminology Relating to Water
2
D 1193 Specification for Reagent Water
NOTE 1—A nitrous oxide-acetylene flame has been used successfully
D 3370 Practices for Sampling Water from Closed Con-
by some to remove chemical interferences.
2
duits
6.2 Strontium chemically resembles calcium and causes a
D 4691 Practice for Measuring Elements in Water by Flame
2 positive error in gravimetric and titrimetric methods for cal-
Atomic Absorption Spectrophotometry
cium determination.
D 4841 Practice for Estimation of Holding Time for Water
2
Samples Containing Organic and Inorganic Constituents
7. Apparatus
3. Terminology
7.1 Atomic Absorption Spectrophotometer for use at 460.7
3.1 Definitions—For definitions of terms used in this test
nm. A general guide for the use of flame atomic absorption
method, refer to Terminology D 1129.
applications is given in Practice D 4691.
3.2 Definition of Term Specific to This Standard:
3.2.1 total recoverable strontium—an arbitrary analytical NOTE 2—The manufacturer’s instructions should be followed for set-
ting instrumental parameters.
term relating to the forms of strontium that are determinable by
the digestion procedure described in this test method.
7.2 Strontium Hollow-Cathode Lamp.
4. Summary of Test Method
8. Reagents and Materials
4.1 Strontium is determined by atomic absorption spectro-
photometry. The sample is aspirated into an air-acetylene flame 8.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
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This test method is under the jurisdiction of ASTM Committee D-19 on Water
tee on Analytical Reagents of the American Chemical Society,
and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
in Water.
Current edition approved May 15, 1992. Published September 1992. Originally
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published as D3920 – 80. Last previous edition D3920 – 86. Standard Method for the Examination of Water and Wastewater, 14th Ed.
2
Annual Book of ASTM Standards, Vol 11.01. American Public Health Assn., Washington, DC 20005.
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D 3920
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where such specifications are available. Other grades may be 10. Standardization
used, provided it is first ascertained that the reagent is of
10.1 Prepare a blank and at least four working standards to
sufficiently high purity to permit its use without lessening the
bracket the expected strontium concentration range of the
accuracy of the determination.
sampl
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