Kinetic Spectrophotometric Method for 4-nitrophenol Determination in Drinking Water
- Authors: Miletić A.S.1, Pecev-Marinković E.T.1, Grahovac Z.M.1, Pavlović A.N.1, Tošić S.B.1, Mišić I.D.1
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Affiliations:
- Faculty of Natural Sciences and Mathematics, Department of Chemistry
- Issue: Vol 74, No 6 (2019)
- Pages: 521-527
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/183220
- DOI: https://doi.org/10.1134/S1061934819060066
- ID: 183220
Cite item
Abstract
This paper describes a rapid, highly sensitive and simple kinetic spectrophotometric method for determination of p-nitrophenol (p-NP) based on its activating effect on sulfanilic acid oxidation by hydrogen peroxide in basic media in the presence of Co2+ as catalyst. Coloration of sulfanilic acid is used to monitor the reaction spectrophotometrically at 368 nm. p-Nitrophenol can be determined in the ranges of 40‒200 and 200‒400 ng/mL under optimal conditions. The detection limit of the method according to 3σ criteria is 8 ng/mL. The RSD is 4.8‒0.8% for concentration interval 40‒200 ng/mL. The kinetic parameters of the reaction are reported, and the rate equations are suggested. The developed procedure was successfully applied to the rapid determination of p-NP in water samples using solid phase extraction for phenol preconcentration and removing interferences. The HPLC method was used as comparative method to verify results.
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About the authors
A. S. Miletić
Faculty of Natural Sciences and Mathematics, Department of Chemistry
Email: emapecev@medianis.net
Serbia, Nis, 18000
E. T. Pecev-Marinković
Faculty of Natural Sciences and Mathematics, Department of Chemistry
Author for correspondence.
Email: emapecev@medianis.net
Serbia, Nis, 18000
Z. M. Grahovac
Faculty of Natural Sciences and Mathematics, Department of Chemistry
Email: emapecev@medianis.net
Serbia, Nis, 18000
A. N. Pavlović
Faculty of Natural Sciences and Mathematics, Department of Chemistry
Email: emapecev@medianis.net
Serbia, Nis, 18000
S. B. Tošić
Faculty of Natural Sciences and Mathematics, Department of Chemistry
Email: emapecev@medianis.net
Serbia, Nis, 18000
I. D. Rašić Mišić
Faculty of Natural Sciences and Mathematics, Department of Chemistry
Email: emapecev@medianis.net
Serbia, Nis, 18000