title: Simultaneous polarographic determination of 2-nitrophenol and 4-nitrophenol by differential pulse polarography method and support vector regression.
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.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51666 16471, Iran. asadpour@tabrizu.ac.ir
authors.forename: Karim
authors.initials: K
authors.lastname: Asadpour-Zeynali
authors.forename: Payam
authors.initials: P
authors.lastname: Soheili-Azad
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D007220:Industrial Waste / Q000032:analysis; D009596:Nitrophenols / Q000032:analysis* / Q000737:chemistry; D011048:Polarography; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D007220:Industrial Waste; D009596:Nitrophenols; D014874:Water Pollutants, Chemical; C045573:2-nitrophenol; C024836:4-nitrophenol