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Examination of the hexamethylenetetramine procedure for separation of thorium from rare earths and for determination of thorium.
MedLine Citation:
PMID:  18959944     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
An examination has been made of the efficiency of the gravimetric reagent hexamethylenetetramine in the separation of thorium from rare earths and in the determination of thorium. Losses to the filtrate, beaker and filter paper are evaluated as well as the extent of rare earth and other contamination of the thorium hydroxide precipitate. When hydroxylamine is used as the reducing agent to keep cerium in the tervalent state, excellent separations are obtained. The efficacy of the reagent is offset by the loss of small amounts of thorium to the precipitation vessel, the scavenging properties of the precipitate for silica and the difficulty in evaluating a true reagent blank.
Authors:
S S Berman; P Semeniuk; D S Russell
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Talanta     Volume:  13     ISSN:  0039-9140     ISO Abbreviation:  Talanta     Publication Date:  1966 Jun 
Date Detail:
Created Date:  2008-10-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  837-46     Citation Subset:  -    
Affiliation:
Division of Applied Chemistry, National Research Council, Ottawa, Canada.
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