Solid-phase spectrophotometric determination of Нg (II) using xylenol orange

Authors

  • Єлизавета Євгеніївна Костенко National University of Food Technologies Vladimirskaya 68, Kiev, Ukraine, 01601, Ukraine
  • Олена Миколаївна Бутенко National University of Food Technologies Vladimirskaya 68, Kiev, Ukraine, 01601, Ukraine

DOI:

https://doi.org/10.15587/1729-4061.2014.26201

Keywords:

spectrophotometry, analysis, mercury, concentration, sorption, dyes, immobilization, anion exchanger

Abstract

The following optimal interaction conditions of mercury with xylenol orange in the phase of the polymeric anion exchanger АВ-178-С1 were determined: maximum extraction (87%) of Hg (II) is achieved at pH 5-7 for 20 minutes of phase contact from the volume of 50 cm3. Quantitative sorption is also possible from 500 cm3 of the solution. Herewith, the concentration coefficient is 1667 cm3/g. The detection limit is 0.2 mcg/cm3. Mercury is not virtually adsorbed by the basis (AB-178). The Baer's law is fulfilled in the mercury concentration range (0,1 – 8,0) 105 М (V = 50сm3). opt = 640 nm.

Complexing of Hg (II) with SP XO is affected by: 1:1- Cu (ІІ), Zn (ІІ), Cd (ІІ), Zr (ІV), Fe (ІІІ); 1:50 - Pb (ІІ), Sn (ІV); 1:100 - Co (ІІ), a.e.m., Br, SO42, F, Al (ІІІ); 1:1000 - NO3.

Chemistry of complexing in the studied system was considered. Ratio of components in the complex - Hg : CO-A = 1 : 1 was determined. Conditional stability constant of the complex lg1 = 16,9 0,5 was calculated.

The data obtained were used to develop a new technique for the SPS determination of mercury (II) in chemicals, which is highly competitive with the best standard techniques by sensitivity, selectivity and promptness, and superior to them by the simplicity of the experiment.

The technique was tested on a model mixture. Data validation was carried out using the "made-found" method. Convergence of results, obtained using the new technique and standard (AAS method), verifies them

Author Biographies

Єлизавета Євгеніївна Костенко, National University of Food Technologies Vladimirskaya 68, Kiev, Ukraine, 01601

Professor

Department of Analytical chemistry

Олена Миколаївна Бутенко, National University of Food Technologies Vladimirskaya 68, Kiev, Ukraine, 01601

Assistant professor

Department of Analytical chemistry

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Published

2014-08-08

How to Cite

Костенко, Є. Є., & Бутенко, О. М. (2014). Solid-phase spectrophotometric determination of Нg (II) using xylenol orange. Eastern-European Journal of Enterprise Technologies, 4(6(70), 44–48. https://doi.org/10.15587/1729-4061.2014.26201

Issue

Section

Technology organic and inorganic substances