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Simultaneous Analysis of Co2+, Cu2+Mn2+, Ni2+and Zn2+in The Ultraviolet Region Using 4-(Pyridil-2-AZO) Resorcinol and Multivariate Calibration

Teresa Cristina Bezerra Saldanha, Mário César Ugulino de Araújo, Benício B. Neto, Henrique C. Chame

Open publisher page 8 citations

Abstract

A multicomponent spectrophotometric methodology for the simultaneous determination of Co2+, Cu2+, Mn2+, Ni2+ and Zn2+ in aqueous solution is reported, using (4-(pyridil-2-azo) resorcinol), a diode array spectrophotometer and multivariate calibration by partial least-squares and principal component regerssions. Spectra are recorded in the UV region. The 225 – 320 nm range is selected as optimal, through a criterion based on tederivatives of the differences between individual spectra, which compares favorably with a genetic algorithm. The methodology is applied to the simultaneous determination of the five than 1.5 mgL−1. The best result are obtanied at pH 9.0, with average absolute errors of prediction lower than 0.09 mgL−1

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What this paper is about

A multicomponent spectrophotometric methodology for the simultaneous determination of Co2+, Cu2+, Mn2+, Ni2+ and Zn2+ in aqueous solution is reported, using (4-(pyridil-2-azo) resorcinol), a diode array spectrophotometer and multivariate calibration by partial least-squares and principal component regerssions. Spectra are recorded in the UV region. The 225 – 320 nm range is selected as optimal, through a criterion based on tederivatives of the differences between individual spectra, which compares favorably with a genetic algorithm. The methodology is applied to the simultaneous determination of the five than 1.5 mgL−1. The best result are obtanied at pH 9.0, with average absolute errors of prediction lower than 0.09 mgL−1

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Available abstract

A multicomponent spectrophotometric methodology for the simultaneous determination of Co2+, Cu2+, Mn2+, Ni2+ and Zn2+ in aqueous solution is reported, using (4-(pyridil-2-azo) resorcinol), a diode array spectrophotometer and multivariate calibration by partial least-squares and principal component regerssions. Spectra are recorded in the UV region. The 225 – 320 nm range is selected as optimal, through a criterion based on tederivatives of the differences between individual spectra, which compares favorably with a genetic algorithm. The methodology is applied to the simultaneous determination of the five than 1.5 mgL−1. The best result are obtanied at pH 9.0, with average absolute errors of prediction lower than 0.09 mgL−1

Key concepts: Chemistry, Analytical Chemistry (journal), Resorcinol, Spectral line, Calibration, Aqueous solution, Spectroscopy, Physical chemistry

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Simultaneous Analysis of Co2+, Cu2+Mn2+, Ni2+and Zn2+in The Ultraviolet Region Using 4-(Pyridil-2-AZO) Resorcinol and Multivariate Calibration — Research Paper | ScholarLens