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

A multicomponent spectrophotometric methodology for the simultaneous determination of Co 2+ , Cu 2+ , Mn 2+ , Ni 2+ and Zn 2+ in aqueous solution is reported, using (4-(pyridil-2-azo) resorcinol), a diode array spectrophotometer and multivariate calibration by partial least-squares and principal com...

Full description

Saved in:
Bibliographic Details
Published in:Analytical letters 2000-01, Vol.33 (6), p.1187-1202
Main Authors: Saldanha, Teresa C. B., de Araújo, Mário César U., Neto, Benício B., Chame, Henrique C.
Format: Article
Language:English
Subjects:
Multivariate calibration
PAR
Spectrophotometry
Wavelength selection
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A multicomponent spectrophotometric methodology for the simultaneous determination of Co 2+ , Cu 2+ , Mn 2+ , Ni 2+ and Zn 2+ 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
ISSN:0003-2719
1532-236X
DOI:10.1080/00032710008543117