ASTM C1254-99(2005)

Standard Test Method for Determination of Uranium in Mineral Acids by X-Ray Fluorescence

SIGNIFICANCE AND USE
This test method is applicable to aqueous solutions of uranium containing 0.05 to 20 g uranium per litre of solution presented to the spectrometer.
Either wavelength-dispersive or energy-dispersive X-ray fluorescence systems may be used provided the software accompanying the system is able to accommodate the use of internal standards.
SCOPE
1.1 This test method covers the steps necessary for the preparation and analysis by X-ray fluorescence (XRF) of mineral acid solutions containing uranium.
1.2 This test method is valid for those solutions containing 2 to 20 g uranium/L as presented to the spectrometer. Higher concentrations may be covered by appropriate dilutions.
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 element or that this contamination has been corrected for mathematically whenever present. Such corrections are not addressed in this test method. Care must also be taken that the choice of internal standard and sample medium are compatible; that is, do not use yttrium with solutions containing HF or strontium with those having H 2 SO 4 . Alternatively a scatter line may be used as internal standard.  
1.4 The values stated in SI units are to be regarded as the standard.
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 8 and Note 1.

General Information

• Status: Historical
• Publication Date: 31-May-2005
• ICS: 27.120.30 - Fissile materials and nuclear fuel technology
• Technical Committee: C26 - Nuclear Fuel Cycle
• Drafting Committee: C26.05 - Methods of Test

Relations

• Replaces: ASTM C1254-99 - Standard Test Method for Determination of Uranium in Mineral Acids by X-Ray Fluorescence
• Effective Date: 01-Jun-2005
• Replaced By: ASTM C1254-13 - Standard Test Method for Determination of Uranium in Mineral Acids by X-Ray Fluorescence
• Effective Date: 01-Jan-2013
• Referred By: ASTM C799-19 - Standard Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Nuclear-Grade Uranyl Nitrate Solutions
• Effective Date: 01-Jun-2005
• Referred By: ASTM C1592/C1592M-21 - Standard Guide for Making Quality Nondestructive Assay Measurements
• Effective Date: 01-Jun-2005
• Referred By: ASTM C1022-17(2022) - Standard Test Methods for Chemical and Atomic Absorption Analysis of Uranium-Ore Concentrate
• Effective Date: 01-Jun-2005
• Referred By: ASTM C1343-16 - Standard Test Method for Determination of Low Concentrations of Uranium in Oils and Organic Liquids by X-ray Fluorescence
• Effective Date: 01-Jun-2005

Standards Content (Sample)

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: C1254 − 99 (Reapproved2005)
Standard Test Method for
Determination of Uranium in Mineral Acids by X-Ray
1
Fluorescence
This standard is issued under the fixed designation C1254; 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 C982 Guide for Selecting Components for Energy-
Dispersive X-Ray Fluorescence (XRF) Systems (With-
1.1 This test method covers the steps necessary for the
4
drawn 2008)
preparation and analysis by X-ray fluorescence (XRF) of
C1118 Guide for Selecting Components for Wavelength-
mineral acid solutions containing uranium.
Dispersive X-Ray Fluorescence (XRF) Systems (With-
4
1.2 This test method is valid for those solutions containing
drawn 2011)
0.05 to 20 g uranium/L as presented to the spectrometer.
D1193 Specification for Reagent Water
Higher concentrations may be covered by appropriate dilu-
E135 Terminology Relating to Analytical Chemistry for
tions.
Metals, Ores, and Related Materials
1.3 This test method requires the use of an appropriate 2.2 Other Document:
internal standard. Care must be taken to ascertain that samples
NBS Handbook 111, Radiation Safety for X-Ray Diffraction
5
analyzed by this test method do not contain the internal and X-Ray Fluorescence Analysis Equipment
standard element or that this contamination has been corrected
3. Terminology
for mathematically whenever present. Such corrections are not
addressed in this test method. Care must also be taken that the
3.1 Definitions:
choiceofinternalstandardandsamplemediumarecompatible;
3.1.1 See Terminology E135 for definitions of terms appli-
that is, do not use yttrium with solutions containing HF or
cable to this test method.
strontium with those having H SO .Alternatively a scatter line
2 4
2
may be used as internal standard. 4. Summary of Test Method
1.4 The values stated in SI units are to be regarded as the 4.1 Solution standards containing 0.025 g/L uranium to 20
standard. g/L uranium and an appropriate internal standard (usually
eitheryttriumorstrontium)areplacedinaliquidsampleholder
1.5 This standard does not purport to address all of the
of an X-ray spectrometer and exposed to an X-ray beam
safety concerns, if any, associated with its use. It is the
capable of exciting the uranium L-alpha emission line and the
responsibility of the user of this standard to establish appro-
appropriate emission line for the internal standard (usually the
priate safety and health practices and determine the applica-
K-alpha line). The intensities generated are measured by an
bility of regulatory limitations prior to use. Specific precau-
appropriate detector. The intensity ratio values obtained from
tionary statements are given in Section 8 and Note 1.
this data are used to calibrate the X-ray analyzer.
2. Referenced Documents
5. Significance and Use
3
2.1 ASTM Standards:
5.1 This test method is applicable to aqueous solutions of
uranium containing 0.05 to 20 g uranium per litre of solution
presented to the spectrometer.
1
This test method is under the jurisdiction ofASTM Committee C26 on Nuclear
5.2 Either wavelength-dispersive or energy-dispersive
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
Test.
X-ray fluorescence systems may be used provided the software
Current edition approved June 1, 2005. Published December 2005. Originally
accompanying the system is able to accommodate the use of
approved in 1993. Last previous edition approved in 1999 as C1254 – 99. DOI:
internal standards.
10.1520/C1254-99R05.
2
Andermann,George,andKemp,J.W.,“ScatteredX-RaysasInternalStandards
in X-ray Spectroscopy,” Analytical Chemistry, Vol 20( 8), 1958.
3 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The last approved version of this historical standard is referenced on
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM www.astm.org.
5
Standards volume information, refer to the standard’s Document Summary page on Available as a photocopy from the U.S. Department of Commerce, National
the ASTM website. Institute of Standards and Technology, Gaithersburg, MD 20899.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1254 − 99 (2005)
6. Apparatus 8.2 Instrument performance may be influenced by environ-
mental factors such as heat, vibration, humidity, dust, stray
6.1 X-Ray Spectrometer—See Guide C982 or Guide C1118
electronic noise, and line voltage stability. These factors and
for the selection of the X-ray spectromete
...