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This practice covered the separation and preconcentration of neptunium-237 (237Np), thorium-232 (232Th), uranium-235 (235U) and uranium-238 (238U) from urine followed by quantitation using ICP-MS.
Formerly under the jurisdiction of Committee C26 on Nuclear Fuel Cycle, this practice was withdrawn in June 2015. This standard is being withdrawn without replacement due to its limited use by industry.
1.1 This practice covers the separation and preconcentration of neptunium-237 (237Np), thorium-232 (232Th), uranium-235 (235U) and uranium-238 (238U) from urine followed by quantitation using ICP-MS.
1.2 This practice can be used to support routine bioassay programs. The minimum detectable concentrations (MDC) for this method, taking the preconcentration factor into account, are approximately 1E-2Bq for 237Np (0.38ng), 2E-6Bq for 232Th (0.50ng), 4E-5Bq for 235U (0.50ng) and 6E-6Bq for 238U (0.48ng).
1.3 This standard does not purport to address all of the safety problems, 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C859 Terminology Relating to Nuclear Materials
C1379 Test Method for Analysis of Urine for Uranium-235 and Uranium-238 Isotopes by Inductively Coupled Plasma-Mass Spectrometry
C1475 Guide for Determination of Neptunium-237 in Soil
D1193 Specification for Reagent Water
D4962 Practice for NaI(Tl) Gamma-Ray Spectrometry of Water
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ASTM C1614-05(2010), Standard Practice for the Determination of 237Np, 232Th, 235U and 238U in Urine by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) and Gamma Ray Spectrometry. (Withdrawn 2015), ASTM International, West Conshohocken, PA, 2005, www.astm.orgBack to Top