ISSN:
1436-5073
Keywords:
chemically modified electrode
;
determination of trace thorium
;
cathodic stripping voltammetry
;
differential pulse voltammetry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract A preconcentration and determination method for thorium in aqueous solution with a tri-n-octylphosphine oxide modified glassy carbon electrode is proposed. In the presence of 2-thenoyltrifluoroacetone, thorium in NaAc-HAc supporting electrolyte is preconcentrated on a modified rotating disk electrode, and a highly sensitive reduction peak is obtained by cathodic stripping voltammetry at −1.10 V versus Ag/AgCl. A linear response of reduction peak height and concentration is observed for 1.15×10−9−1.44×10−8 mol·1−1 of thorium and the detection limit is 1.0×10−9mol·1−1. It is very selective and sensitive, with a standard deviation of 3.4% and a recovery of 90–110%.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01197288
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