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A caveat on the use of 2-mercaptoethanol in plant technetium speciation procedures

✍ Scribed by A.V. Harms; H.Th. Wolterbeek; U.D. Woroniecka

Book ID
103990025
Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
384 KB
Volume
47
Category
Article
ISSN
0969-8043

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✦ Synopsis

2-Mercaptoethanol, a reducing and chelating compound extensively used in plant technetium speciation procedures, is shown to react with the technetium-diethylenetriaminepentaacetate (Tc-DTPA) complex. The results of earlier plant technetium speciation studies should therefore be interpreted with caution, because of the possibility of reactions between labile plant technetium species and 2-mercaptoethanol.

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The fluorimetric determination of secondary amines based on conversion with sodium hypochlorite to primary amines and the o-phthalaldehyde-mercaptoethanol (OPA) reagent is discussed. Interferences by excess of hypochlorite (e.g., oxidation of OPA or conversion of primary amines to chloramines) were