ASTM C1343-96

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: C 1343 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
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Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Determination of Low Concentrations of Uranium in Oils
1
and Organic Liquids by X-ray Fluorescence
This standard is issued under the fixed designation C 1343; 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 2.2 NIST Document:
NBS Handbook 111, Radiation Safety for X-ray Diffraction
1.1 This test method covers the steps necessary for the
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and X-ray Fluorescence Analysis Equipment
preparation and analysis by X-ray fluorescence (XRF) of oils
and organic solutions containing uranium.
3. Terminology
1.2 The procedure is valid for those solutions containing 20
3.1 Definitions—See definitions in Terminology E 135.
to 2000 μg uranium/mL as presented to the spectrometer.
1.3 This test method requires the use of an appropriate
4. Summary of Test Method
internal standard. Care must be taken to ascertain that samples
4.1 Solution standards containing 20 μg uranium/mL to
analyzed by this test method do not contain the internal
2000 μg uranium/mL and an internal standard are placed in a
standard or that this contamination, whenever present, has been
liquid sample holder of an X-ray spectrometer and exposed to
corrected for mathematically. Such corrections are not ad-
an X-ray beam capable of exciting the uranium L-a emission
dressed in this procedure. Care must be taken that the internal
line and the appropriate internal standard line. The intensities
standard and sample medium are compatible; that is, samples
generated are measured by an appropriate detector. The inten-
must be miscible with tri-n-butyl phosphate (TBP) and must
sity ratio values obtained from these data are used to calibrate
not remove the internal standard from solution. Alternatively, a
2 the X-ray analyzer. Samples are prepared having a similar
scatter line may be used as the internal standard.
matrix to fit the calibration range and measured using the same
1.4 The values stated in SI units are to be regarded as the
analytical parameters.
standard. The values given in parentheses are for information
only.
NOTE 1—Yttrium, strontium, and bromine K-a and thorium L-a lines
1.5 This standard does not purport to address all of the have been used successfully as internal standard lines. Explanation of the
internal standard method of analysis is outside the scope of this test
safety concerns, if any, associated with its use. It is the
7,8
method and is found in several sources.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use. Specific precau-
5.1 This test method is applicable to organic solutions
tionary statements are given in Section 9 and Note 2.
containing 20 to 2000 μg uranium/mL of solution presented to
the spectrometer.
2. Referenced Documents
5.2 Either wavelength-dispersive or energy-dispersive XRF
2.1 ASTM Standards:
systems may be used, provided that the software accompany-
C 982 Guide for Selecting Components for Energy-
ing the system is able to accommodate the use of internal
3
Dispersive X-Ray Fluorescence (XRF) Systems
standards.
C 1118 Guide for Selecting Components for Wavelength-
3
Dispersive X-Ray Fluorescence (XRF) Systems
6. Interferences
4
D 1193 Specification for Reagent Water
6.1 This test method requires the use of an internal standard.
E 135 Terminology Relating to Analytical Chemistry for
Care must be taken that the samples analyzed by this test
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Metals, Ores, and Related Materials
method do not contain the internal standard or chemicals that
would remove the internal standard from solution. The samples
must also be miscible with TBP.
1
This test method is under the jurisdiction of ASTM Committee C-26 on Nuclear
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
Test.
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Current edition approved July 10, 1996. Published September 1996. Available from U.S. Department of Commerce, National Institute of Standards
2
Andermann, G., and Kemp, J. W., “Scattered X-rays as Internal Standards in and Technology, Gaithersburg, MD 20899.
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X-ray Spectroscopy,” Analytical Chemistry, Vol 20, No. 8, 1958. Bertin, E. P., Introduction to X-ray Spectrometric Analysis, Plenum Press, New
3
Annual Book of ASTM Standards, Vol 12.01. York and London, 1978.
4 8
Annual Book of ASTM Standards, Vol 11.01. Tertian, R., and Claisse, F., Principles of Quantitative X-ra
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