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Significance and Use
This test method is applicable to organic solutions containing 20 to 2000 μg uranium per mL of solution presented to the spectrometer for the solution techniques or 200 to 50 000 μg uranium per g using the fused pellet technique.
Either wavelength-dispersive or energy-dispersive XRF systems may be used, provided that the software accompanying the system is able to accommodate the use of internal standards.
1.1 This test method covers the steps necessary for the preparation and analysis by X-ray fluorescence (XRF) of oils and organic solutions containing uranium. Two different preparation techniques are described.
1.2 The procedure is valid for those solutions containing 20 to 2000 μg uranium per mL as presented to the spectrometer for the solution technique and 200 to 50 000 μg uranium per g for the pellet technique.
1.3 This test method requires the use of an appropriate internal standard. Care must be taken to ascertain that samples analyzed by this test method do not contain the internal standard or that this contamination, whenever present, has been corrected for mathematically. Such corrections are not addressed in this procedure. Care must be taken that the internal standard and sample medium are compatible; that is, samples must be miscible with tri-n-butyl phosphate (TBP) and must not remove the internal standard from solution. Alternatively, a scatter line may be used as the internal standard.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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 Section 9 and Note 2.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C1110 Practice for Sample Preparation for X-Ray Emission Spectrometric Analysis of Uranium in Ores Using the Glass Fusion or Pressed Powder Method
C1254 Test Method for Determination of Uranium in Mineral Acids by X-Ray Fluorescence
D1193 Specification for Reagent Water
E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
NIST DocumentANSI/HPSN43.2– Radiation Safety for X-ray Diffraction and X-ray Fluorescence Analysis Equipment Available from U.S. Department of Commerce, National Institute of Standards and Technology, Gaithersburg, MD 20899.
ICS Number Code 17.240 (Radiation measurements)
UNSPSC Code 15131500(Nuclear fuel)