ASTM D3352-94(1999)
(Test Method)Standard Test Method for Strontium Ion in Brackish Water, Seawater, and Brines
Standard Test Method for Strontium Ion in Brackish Water, Seawater, and Brines
SCOPE
1.1 This test method covers the determination of soluble strontium ion in brackish water, seawater, and brines by atomic absorption spectrophotometry.
1.2 Samples containing from 5 to 2100 mg/L of strontium may be analyzed by this test method.
1.3 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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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Designation: D 3352 – 94 (Reapproved 1999)
Standard Test Method for
Strontium Ion in Brackish Water, Seawater, and Brines
This standard is issued under the fixed designation D 3352; 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 placed in the beam of radiation by aspirating the specimen into
an oxidant-fuel flame. A monochromator isolates the charac-
1.1 This test method covers the determination of soluble
teristic radiation from the hollow cathode lamp and a photo-
strontium ion in brackish water, seawater, and brines by atomic
sensitive device measures the attenuated transmitted radiation.
absorption spectrophotometry.
4.2 Since the variable and sometimes high concentrations of
1.2 Samples containing from 5 to 2100 mg/L of strontium
matrix materials in the waters and brines affect absorption
may be analyzed by this test method.
differently, it is difficult to prepare standards sufficiently similar
1.3 This standard does not purport to address all of the
to the waters and brines. To overcome this difficulty, the
safety concerns, if any, associated with its use. It is the
method of additions is used in which three identical samples
responsibility of the user of this standard to establish appro-
are prepared and varying amounts of a standard added to two
priate safety and health practices and determine the applica-
of them. The three samples are then aspirated, the concentra-
bility of regulatory limitations prior to use.
tion readings recorded, and the original sample concentration
2. Referenced Documents
calculated.
2.1 ASTM Standards:
5. Significance and Use
D 1129 Terminology Relating to Water
5.1 This test method can be used to determine strontium
D 1193 Specification for Reagent Water
ions in brackish water, seawater, and brines.
D 2777 Practice for Determination of Precision and Bias of
Applicable Methods of Committee D-19 on Water
6. Interferences
D 3370 Practices for Sampling Water from Closed Con-
2 6.1 The chemical suppression caused by silicon, aluminum,
duits
and phosphate is controlled by adding lanthanum. The lantha-
3. Terminology num also controls ionization interference.
3.1 Definitions—For definitions of terms used in this test
7. Apparatus
method, refer to Terminology D 1129.
7.1 Atomic Absorption Spectrophotometer—The instrument
4. Summary of Test Method shall consist of atomizer and burner, suitable pressure-
regulating devices capable of maintaining constant oxidant and
4.1 This test method is dependent on the fact that metallic
fuel pressure for the duration of the test, a hollow cathode lamp
elements, in the ground state, will absorb light of the same
for each metal to be tested, an optical system capable of
wavelength they emit when excited. When radiation from a
isolating the desired line of radiation, an adjustable slit, a
given excited element is passed through a flame containing
photomultiplier tube or other photosensitive device as a light
ground state atoms of that element, the intensity of the
measuring and amplifying device, and a read-out mechanism
transmitted radiation will decrease in proportion to the amount
for indicating the amount of absorbed radiation.
of the ground state element in the flame. A hollow cathode
7.1.1 Multi-Element Hollow Cathode Lamps are available
lamp whose cathode is made of the element to be determined
and have been found satisfactory.
provides the radiation. The metal atoms to be measured are
7.2 Pressure-Reducing Valves—The supplies of fuel and
oxidant shall be maintained at pressures somewhat higher than
the controlled operating pressure of the instrument by suitable
This test method is under the jurisdiction of ASTM Committee D-19 on Water
and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
valves.
in Water.
Current edition approved April 15, 1994. Published June 1994. Originally
e1
published as D 3352 – 74. Last previous edition D 3352 – 74 (1989).
2 4
Annual Book of ASTM Standards, Vol 11.01. Additional information is contained in the following references: Fletcher, G. F.,
For additional information on atomic absorption, see the following references: and Collins, A. G., “Atomic Absorption Methods of Analysis of Oilfield Brines:
Angino, E. E., and Billings, G. K., Atomic Absorption Spectrophotometry in Barium, Calcium, Copper, Iron, Lead, Lithium, Magnesium, Manganese, Potassium,
Geology, Elsevier Publishing Co., New York, N.Y., 1967. Dean, J. A., and Rains, T. Sodium, Strontium, and Zinc,” U.S. Bureau of Mines, Report of Investigations
C., Editors, Flame Emission and Atomic Absorption Spectrometry Vol 1 − Theory, 7861, 1974, 14 pp. Collins, A. G., Geochemistry of Oilfield Waters, Elsevier
Marcel Dekker, New York, NY, 1969. Publishing Co., Amsterdam. The Netherlands, 1975.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 3352
TABLE 1 Compositions of Artificial Brine Samples TABLE 2 Determination of Precision and Bias of Strontium Ion
g/L Statistically
Sample No.
Amount Amount Significant
1 234
Added, Found, S S 6 Bias (95 %
O T
mg/L mg/L Confidence
Sr 0.060 0.100 1.600 2.100
Level)
NaCl 24.0 170.0 80.0 200.0
KCl 0.5 2.0 1.5 3.0
60 63.48 2.96 8.49 + 5.8 yes
KBr 1.0 2.0 2.0 2.0
100 99.5 4.12 11.84 −0.5 no
KI 0.1 0.5 0.5 1.0
1600 1665.6 54.87 157.3 + 4.1 no
CaCl 1.5 3.0 2.0 5.0
2100 2167.2 71.12 203.9 + 3.2 no
MgCl 4.5 5.0 2.0 1.0
BaCl 0.05 1.0 0.5 0.5
10.2 Preliminary Calibration—Using micropipets prepare
standard strontium solutions containing 1 to 10 mg/L of
strontium using the standard strontium solution and 50-mL
8. Reagents and Materials
volumetric flasks. Before making up to volume, add to each of
8.1 Purity of Reagents—Reagent grade chemicals shall be
these and to a blank, 5 mL of the lanthanum solution. Aspirate
used in all tests. Unless otherwise indicated, it is intended that
these standards and the blank (for background setting) and
all reagents shall conform to the specifications of the Commit-
5 adjust the curvature controls, if necessary, to obtain a linear
tee on Analytical Reagents of the American Chemical Society,
relationship between absorbance and the actual concentration
where such specifications
...
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