Simultaneous spectrophotometric determination of copper, nickel, and zinc using 1-(2-thiazolylazo)-2-naphthol in the presence of triton x-100 using chemometric methods
Document Type
Article
Publication Date
1-1-2009
Abstract
Multivariate models were developed for the simultaneous spectrophotometric determination of copper (II), nickel (II) and zinc (II) in water with 1-(2-thiazolylazo)-2-naphthol as chromogenic reagent in the presence of Triton X-100. To overcome the drawback of spectral interferences, principal component regression (PCR) and partial least square (PLS) multivariate calibration approaches were applied. Performances were validated with several test sets, and their results were then compared. In general, no significant difference in analytical performance between PLS and PCR models. The root mean square error of prediction (RMSEP) using three components for Cu 2+, Ni 2+ and Zn 2+ were 0.018, 0.010, 0.011 ppm, respectively. Figures of merit such as sensitivity, analytical sensitivity, limit of detection (LOD) were also estimated. High reliability was achieved when the proposed procedure was applied to simultaneous determination of Cu 2+, Ni 2+ and Zn 2+ in synthetic mixture and tap water.
Keywords
Calibration, Chemometric, Metal, Regression, Spectrophotometric, 1-(2-thiazolylazo)-2-naphthol, Analytical performance, Chemometric method, Chemometrices, Chromogenic reagents, Figures of merits, High reliability, Limit of detection, Multivariate calibration, Multivariate models, Partial least squares, Principal component regression, Root-mean-square error of predictions, Simultaneous determinations, Spectral interference, Spectrophotometric determination, Synthetic mixtures, Tap water, Test sets, Three component, Triton X-100, Nickel alloys, Nickel compounds, Phenols, Regression analysis, Spectrophotometers, Zinc, Zinc compounds, Spectrophotometry
Divisions
CHEMISTRY
Publication Title
Journal of the Korean Chemical Society
Volume
53
Issue
6
Additional Information
Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA