ASTM D2907-97
(Test Method)Standard Test Methods for Microquantities of Uranium in Water by Fluorometry (Withdrawn 2003)
Standard Test Methods for Microquantities of Uranium in Water by Fluorometry (Withdrawn 2003)
SCOPE
1.1 These test methods are applicable to the determination of microquantities of uranium in water in the concentration range from 0.005 to 50 mg/L.
1.2 The uranium fluorescence is quenched by many cations and some anions in the sample; it is enhanced by a few cations. If interfering ions are present, a direct fluorometric measurement is not suitable, and an extraction method must be used to provide accurate results. The test methods and their concentration ranges are as follows: Concentration Range, mg/L Sections Test Method A---Direct Fluorometric 0.005 to 2 7 to 15 Test Method B---Extraction 0.04 to 50 16 to 24
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. For specific hazards, see Note 1.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact
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Designation: D 2907 – 97
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 Methods for
1
Microquantities of Uranium in Water by Fluorometry
This standard is issued under the fixed designation D 2907; 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 methods refer to Terminology D 1129.
1.1 These test methods cover the determination of micro-
4. Significance and Use
quantities of uranium in water in the concentration range from
4.1 These test methods have been referenced in the National
0.005 to 50 mg/L.
Interim Primary Drinking Water Regulations (Title 40, Part
1.2 The uranium fluorescence is quenched by many cations
141; Federal Register Vol 41, No. 133, July 1976) as the
and some anions in the sample; it is enhanced by a few cations.
approved test methods of analysis for uranium in water.
If interfering ions are present, a direct fluorometric measure-
However, the following limitation of these test methods should
ment is not suitable, and an extraction method shall be used to
be duly noted when considering their use for determining the
provide accurate results. The test methods and their concen-
uranium alpha contribution to a gross alpha measurement of a
tration ranges are as follows:
drinking water sample.
Concentration
4.2 Uranium occurs naturally in three isotopic forms,
Range, mg/L Sections
Test Method A—Direct Fluorometric 0.005 to 2 7 to 15
namely as U-238, U-235, and U-234 (U-234 being a decay
Test Method B—Extraction 0.04 to 50 16 to 24
product of U-238). These isotopics occur in the approximate
1.3 The values stated in SI units are to be regarded as the
respective mass percentages of 99.3, 0.7, and 0.0057. However,
standard.
because of the different decay rates of the three isotopics, their
1.4 This standard does not purport to address all of the
respective alpha particle activities are 12.21, 0.55 and 13.02
safety concerns, if any, associated with its use. It is the
Becquerels, per milligram (Bq/mg) (330, 15, and 352 picocu-
responsibility of the user of this standard to establish appro-
ries per milligram) (pCi/mg) of natural uranium.
priate safety and health practices and determine the applica-
4.3 It is now known, from uranium isotopic analysis by
bility of regulatory limitations prior to use. For specific
alpha spectrometry, that the U-238/U-234 abundance ratios in
hazards, see Note 1. ground water systems can be well out of equilibrium. Instead
of the 1 to 1.07 (12.21 to 13.02) alpha activity ratio that occurs
2. Referenced Documents
in natural uranium deposits, the isotopic alpha activity ratios in
2.1 ASTM Standards:
ground water systems have been found to be as much as 1 to
2
D 1066 Practice for Sampling Steam
20. There is no single valid factor for converting measured
2
D 1129 Terminology Relating to Water
mass units of uranium in ground water samples to uranium
D 1192 Specification for Equipment for Sampling Water
alpha particle activity. Therefore, a uranium mass measurement
2
and Steam
method such as this fluorometric (or colorimetric) method
2
D 1193 Specification for Reagent Water
should not be used to determine the uranium alpha activity of
2
D 3370 Practices for Sampling Water
water.
E 217 Test Method for Uranium by Controlled-Potential
3
5. Reagents
Coulometry
E 318 Test Method for Uranium in Aqueous Solutions by
5.1 Purity of Reagents—Reagent grade chemicals shall be
4
Colorimetry
used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
3. Terminology
tee on Analytical Reagents of the American Chemical Society,
3.1 Definitions—For definitions of terms used in these test 5
where such specifications are available. Other grades may be
used, provided it is first ascertained that the reagent is of
1
These test methods are under the jurisdiction of ASTM Committee D-19 on
Water and are under the direct responsibility of Subcommittee D19.04 on Methods
5
of Radiochemical Analysis. Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved Aug. 10, 1997. Published October 1997. Originally Chemical Society, Washington, DC. For suggestions on the testing of reagents not
published as D 2907–70T. Last previous edition D 2907–91. listed by the American Chemical Society, see Analar Standards for Laboratory
2
Annual Book of ASTM Standards, Vol 11.01. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
3
Discontinued; see 1991 Annual Book
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