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Title: Comparison of the Davies and Gray titrimetric method with potassium dichromate and ceric titrants

Journal Article · · Journal of Radioanalytical and Nuclear Chemistry
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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The modified New Brunswick Laboratory (NBL) Davies and Gray titrimetry method uses potassium dichromate standard 136-f from the National Institute of Standards and Technology for calibration. However, the presence of chromium in the resulting waste stream makes the disposal of waste from this procedure costly. We report that the Actinide Analytical Chemistry (C-AAC) group at Los Alamos National Laboratory investigated and transitioned to a cerium based titrant as an alternative. We present the first long-term analytical study using this ceric-based titration method and compare it with NBL results based on the more-widely used dichromate titrimetric method.

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1469553
Report Number(s):
LA-UR-18-22775
Journal Information:
Journal of Radioanalytical and Nuclear Chemistry, Journal Name: Journal of Radioanalytical and Nuclear Chemistry Journal Issue: 1 Vol. 318; ISSN 0236-5731
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (6)

Uranium assay determination using Davies and Gray titration: an overview and implementation of GUM for uncertainty evaluation journal July 2009
Uranium assay and trace element analysis of the fourth collaborative material exercise samples by the modified Davies-Gray method and the ICP-MS/OES techniques journal January 2018
A rapid and specific titrimetric method for the precise determination of uranium using iron(II) sulphate as reductant journal August 1964
Studies on the nature of the reactions and species involved in potentiometric titrimetric determination of uranium journal March 1983
Dissolution of Uranium Metal and its Alloys journal April 1959
Toxicity and Carcinogenicity of Chromium Compounds in Humans journal January 2006

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Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
Davies and Gray
Uranium Assay
certified reference materials
nuclear safeguards
titrimetry
traceability