Determination of p-nitrobenzene-azo-naphthol by an oscillating chemical reaction using the analyte pulse perturbation technique

• Autorzy: Jinzhang Gao , Kanjun Sun , Wu Yang , Huixian Zhou
• Języki publikacji: EN

Abstrakty

EN

A simple analytical method for the determination of p-nitrobenzene-azo-naphthol was proposed by a sequential perturbation with different amounts of p-nitrobenzene-azo-naphthol on an oscillating chemical system. The method involves a Cu(II)-catalysed oscillating reaction between hydrogen peroxide and sodium thiocyanate in alkaline medium with the aid of continuous-flow stirred tank reactor (CSTR). A good linear relationship between the changes, oscillation amplitude or/and period, and the concentration of p-nitrobenzene-azo-naphthol was obtained. The use of analyte pulse perturbation technique provides a possibility of sequential determination in a same oscillating system, due to a new steady state that reappeared rapidly after each perturbation. The calibration curve fits a linear equation very well when the concentration of p-nitrobenzene-azo-naphthol ranging from 5.2×10−7 to 3.3×10−3M. Influence of temperature, injection point, flow rate and reactants variables on this system were investigated in detail.

Słowa kluczowe

EN

p-nitrobenzene-azo-naphthol; oscillating chemical system; analyte pulse perturbation technique

• Czasopismo: Open Chemistry
• Rocznik: 2005
• Tom: 3
• Numer: 3
• Strony: 502-510

Daty

wydano

2005-09-01

online

2005-09-01

Twórcy

autor

Jinzhang Gao

• Department of Chemistry, Northwest Normal University, 730070, Lanzhou, P.R. China,

autor

Kanjun Sun

• Department of Chemistry, Northwest Normal University, 730070, Lanzhou, P.R. China

autor

Wu Yang

• Department of Chemistry, Northwest Normal University, 730070, Lanzhou, P.R. China

autor

Huixian Zhou

• Department of Chemistry, Northwest Normal University, 730070, Lanzhou, P.R. China

Bibliografia

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Identyfikatory

DOI

10.2478/BF02479278