Indirect Spectrophotometric Determination of Vanadium(IV) by Flow Injection Analysis Based on the Redox Reaction with Copper(II) in the Presence of Neocuproine
1991; Taylor & Francis; Volume: 24; Issue: 7 Linguagem: Inglês
10.1080/00032719108052965
ISSN1532-236X
AutoresHideyuki Itabashi, Kazuyuki Umetsu, Keiichi Satoh, Takuji Kawashima,
Tópico(s)Analytical Chemistry and Sensors
ResumoAbstract An indirect photometric method with a continuous-flow analysis is presented for the determination of trace amounts of vanadium(IV). It is based on the redox reaction of copper(II) with vanadium(1V) in the presence of neocuproine. In the presence of neocuproine, copper(I1) is reduced easily by vanadium(I V) to a copper(1)-neocuproine complex, which shows a n absorption maximum at 454 nm. By measuring t h e absorbance of the complex at this wavelength, vanadium(1V) in t h e range 2×10−6 - 8 × mol dm−5 mol dm−3 can be determined at a rate of 120 samples h−1. The fractional determination of vanadium(1V) and iron(I1) is also studied. Key Words: Vanadium(IV)iron(II)copper(I)-neocuproineflow injection analysisspectrophotometry
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