Simultaneous polarographic determination of 2-nitrophenol and 4-nitrophenol by differential pulse polarography method and support vector regression |
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Authors: | Karim Asadpour-Zeynali Payam Soheili-Azad |
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Institution: | (1) Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Charles University, 128 43 Prague 2, Czech Republic;(2) Rua Leopoldo Bulhoes, CESTEH/ENSP/FIOCRUZ, 1480–Manguinhos, 21041-210 Rio de Janeiro, Brazil; |
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Abstract: | A differential pulse polarography (DPP) for the simultaneous determination of 2-nitrophenol and 4-nitrophenol was proposed.
It was found that under optimum experimental conditions (pH = 5, scan rate = 5 mV/s, pulse amplitude = −50 mV), 2-nitrophenol
and 4-nitrophenol had well-defined polarographic reduction waves with peak potentials at −317 and −406 mV, respectively. In
the mixture of two compounds overlapping polarographic peaks were observed. In this study, support vector regression (SVR)
was applied to resolve the overlapped polarograms. Furthermore, a comparison was made between the performance of SVR and partial
least square (PLS) on data set. The results demonstrated that SVR is a better well-performing alternative for the analysis
and modeling of DPP data than the commonly applied PLS technique. The proposed method was used for the determination of 2-nitrophenol
and 4-nitrophenol in industrial waste water. |
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