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
Technical Committee
Current Stage
Ref Project

Relations

Buy Standard

Standard
ASTM D3920-02 - Standard Test Method for Strontium in Water
English language
4 pages
sale 15% off
Preview
sale 15% off
Preview

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 3920–02
Standard Test Method for
1
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 3.2.1 total recoverable strontium, n—an arbitrary analytical
termrelatingtotheformsofstrontiumthataredeterminableby
1.1 This test method covers the determination of dissolved
the digestion procedure described in this test method.
and total recoverable strontium in water and wastewater by
3.2.2 laboratory control sample, n—a solution with a cer-
atomic absorption spectroscopy.
tified concentration of the strontium.
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
4. Summary of Test Method
the original sample.
4.1 Strontium is determined by atomic absorption spectro-
1.3 Round-robin data were obtained in natural and reagent
photometry.Thesampleisaspiratedintoanair-acetyleneflame
water matrices. It is the user’s responsibility to ensure the
following the addition of lanthanum chloride/potassium chlo-
validity of the test method for waters of untested matrices.
ride solution. Samples containing particulate matter that may
1.4 This standard does not purport to address all of the
clogtheaspiratorcapillaryorburner,thusproducinginaccurate
safety concerns, if any, associated with its use. It is the
results, are filtered through a 0.45-µm membrane filter prior to
responsibility of the user of this standard to establish appro-
testing.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific precau-
5. Significance and Use
tionary statements are given in 8.4 and 8.9.
5.1 Although most potable supplies contain little strontium,
some well waters in the midwestern part of the United States
2. Referenced Documents
4
have levels as high as 39 mg/L.
2.1 ASTM Standards:
2 5.2 This test method affords a reliable means of accurately
D 1129 Terminology Relating to Water
2
determining strontium and correcting calcium results obtained
D 1193 Specification for Reagent Water
by the methods cited in 6.2.
D 3370 Practices for Sampling Water from Closed Con-
2
duits
6. Interferences
D 4691 Practice for Measuring Elements inWater by Flame
2 6.1 Chemical interference caused by silicon, aluminum, and
Atomic Absorption Spectrophotometry
phosphate is controlled by adding lanthanum chloride. Potas-
D 4841 Practice for Estimation of Holding Time for Water
2 sium chloride is added to suppress the ionization of strontium.
Samples Containing Organic and Inorganic Constituents
2
D 5810 Guide for Spiking into Aqueous Samples
NOTE 1—A nitrous oxide-acetylene flame has been used successfully
by some to remove chemical interferences.
D 5847 Practice for Writing Quality Control Specifications
3
for Standard Test Methods for Water Analysis
6.2 Strontium chemically resembles calcium and causes a
positive error in gravimetric and titrimetric methods for cal-
3. Terminology
cium determination.
3.1 Definitions—For definitions of terms used in this test
method, refer to Terminology D 1129. 7. Apparatus
3.2 Definition of Term Specific to This Standard:
7.1 Atomic Absorption Spectrophotometer for use at 460.7
nm. A general guide for the use of flame atomic absorption
applications is given in Practice D 4691.
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
NOTE 2—The manufacturer’s instructions should be followed for set-
and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
in Water. ting instrumental parameters.
Current edition approved May 10, 2002. Published June 10, 2002. Originally
published as D3920 – 80. Last previous edition D3920 – 92 (1996).
2 4
Annual Book of ASTM Standards, Vol 11.01. Standard Method for the Examination of Water and Wastewater, 14th Ed.
3
Annual Book of ASTM Standards, Vol 11.02. American Public Health Assn., Washington, DC 20005.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D 3920–02
7.2 Strontium Hollow-Cathode Lamp. 9. Sampling
9.1 Collect the samples in accordance with instructions in
8. Reagents and Materials
Practices D 3370. The holding time for the samples may be
8.1 Purity of Reagents—Reagent grade chemicals shall be
calculated in accordance with Practice D 4841.
used in all tests. Unless otherwise indicated, it is intended that
9.2 To preserve the samples add concentrated HNO (sp gr
3
all reagents shall conform to the specificati
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.