1. Simultaneous determination of cobalt and palladium in micellar media using H-point standard addition method and partial least square regression
- Author
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Bagherian, G., Chamjangali, M. Arab, and Eskandari, H.
- Subjects
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SPECTROPHOTOMETRY , *RESORCINOL , *LEAST squares , *ALLOYS , *MICELLES - Abstract
Abstract: A simple, sensitive and selective spectrophotometric method for the simultaneous determination of Co(II) and Pd(II) using partial least square (PLS) calibration and H-point standard addition method is described. The method is based on the complex formation of Co(II) and Pd(II) with 4-(2-pyridylazo) resorcinol (PAR) in acidic media and in the presence of sodium dodecyl sulfate (SDS) as a micellizing agent. Acidic media and the presence of a micellar system improve selectivity and sensitivity, respectively. By applying PLS calibration, Co(II) and Pd(II) can be determined in the range of 0.20–2.0 and 0.40–4.0μgml−1, respectively. The relative errors of prediction for the determination of Co(II) and Pd(II) in the 10 prediction samples were 1.69 and 1.72%, respectively. The results of applying H-point standard addition method show that Co(II) and Pd(II) can be determined simultaneously with concentration ratio of Co(II) to Pd(II) varying between 7:1 and 1:8 in the mixed samples. Both proposed methods (PLS and HPSAM) were applied to the determination of Co(II) and Pd(II) in several alloy solutions with satisfactory results. [Copyright &y& Elsevier]
- Published
- 2007
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