Spectrophotometric Simultaneous Determination of Cobalt and Nickel using 4-(5-Br-2 pyridylazo)-1,3-diaminobenzene (5-Br-PADAB) in Alloys by Partial Least Squares
1Department of Chemistry, Islamic Azad University, Qom-Branch, Qom (Iran).
2Department of Chemistry, Faculty of Science,The University of Qom, P. O. Box: 37185-359, Qom (Iran).
3Department of Chemistry,K.N. Toosi University, of Technology, Tehran (Iran).
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In this paper, a spectrophotometric method for simultaneous determination of Co (II) and Ni (II) using 4-(5-Br-2 pyridylazo)-1,3-diaminobenzene (5-Br-PADAB) as a chelating agent is introduced. During the study, the parameters controlling behavior of the system were examined and optimum conditions were selected. The impact of pH on the sensitivity and selectivity was investigated according to net analyte signal. A partial least squares multivariate calibration procedure was used for the analysis of binary mixtures of Co (II) and Ni (II) between 200 and 700 nm over the range of 85 – 1300 and 100 -1010 ng ml
KEYWORDS:Nickel; Cobalt; 5-Br-PADAB; Simultaneous determination; PLS
