ASTM D3651-07

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Designation: D3651 – 07
Standard Test Method for
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Barium in Brackish Water, Seawater, and Brines
This standard is issued under the fixed designation D3651; 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 3. Terminology
1.1 This test method covers the determination of soluble 3.1 For definitions of terms used in this test method, refer to
barium ion in brackish water, sea-water, and brines by atomic Terminology D1129.
absorption spectrophotometry.
4. Summary of Test Method
1.2 The actual working range of this test method is 1 to 5
3
mg/L barium. 4.1 This test method is dependent upon the fact that
metallic atoms, in the ground state, will absorb light of the
1.3 This test method was used successfully on artificial
brine samples. It is the user’s responsibility to ensure the samewavelengththeyemitwhenexcited.Whenradiationfrom
a given excited element is passed through a flame containing
validity of this test method for waters of untested matrices.
1.4 This standard does not purport to address all of the ground state atoms of that element, the intensity of the
transmitted radiation will decrease in proportion to the amount
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- of the ground state element in the flame. A hollow-cathode
lamp whose cathode is made of the element to be determined
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. provides the radiation.
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4.2 The metal atoms to be measured are placed in the beam
2. Referenced Documents
of radiation by aspirating the specimen into an oxidant-fuel
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2.1 ASTM Standards: flame. A monochromator isolates the characteristic radiation
D1129 Terminology Relating to Water from the hollow-cathode lamp and a photosensitive device
D1193 Specification for Reagent Water measures the attenuated transmitted radiation.
D2777 Practice for Determination of Precision and Bias of 4.3 Sincethevariableandsometimeshighconcentrationsof
Applicable Test Methods of Committee D19 on Water matrix materials in the waters and brines affect absorption
D3370 Practices for Sampling Water from Closed Conduits differently, it becomes imperative to prepare standard samples
D4691 Practice for Measuring Elements in Water by Flame with matrices similar to the unknown samples. This is accom-
Atomic Absorption Spectrophotometry plished by preparing synthetic standard samples with similar
D4841 Practice for Estimation of Holding Time for Water compositions as the unknowns. The standard samples and
Samples Containing Organic and Inorganic Constituents unknown samples are aspirated, the absorption readings re-
D5810 Guide for Spiking into Aqueous Samples corded, a calibration curve for the standard samples con-
D5847 Practice for Writing Quality Control Specifications structed, and the original sample concentration calculated.
for Standard Test Methods for Water Analysis
1 3
This test method is under the jurisdiction of ASTM Committee D19 on Water Fletcher,G.F.andCollins,A.G.,AtomicAbsorptionMethodsofAnalysisofOil
and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents Field Brines: Barium, Calcium, Copper, Iron, Lead, Lithium, Magnesium, Manga-
in Water. nese, Potassium, Sodium, Strontium, and Zinc, U. S. Bureau of Mines, Report of
Current edition approved Aug. 1, 2007. Published August 2007. Originally Investigations 7861, 1974, 14 pp. Collins,A. G., Geochemistry of Oil Field Waters,
approved in 1978. Last previous edition approved in 2002 as D3651 – 02. DOI: Elsevier Publishing Co., Amsterdam, The Netherlands, 1974.
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10.1520/D3651-07. Angino, E. E. and Billings, G. K., Atomic Absorption Spectrophotometry in
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Geology, Elsevier Publishing Co., NewYork, NY1967. Dean, J.A. and Rains,T.C.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Editors, Flame Emission and Atomic Absorption Spectrophotometry, Vol. 1,Theory,
Standards volume information, refer to the standard’s Document Summary page on 1969, Vol 2, Components, 1971, and Vol 3, Elements and Matrices, 1975, Marcel
the ASTM website. Dekker, New York, NY.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3651 – 07
5. Significance and Use 8.3 Barium Solution, Stock (1 mL = 1 mg Ba)—Dissolve
1.779 g of barium chloride (BaCl ·2H O) in 50 mL of
2 2
5.1 Since wat
...