Affiliation:
1. Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland
Abstract
The aim of this paper was to investigate the effect of temperature on the removal efficiency of surfactant-induced interferences. Surfactants were removed as a result of mixing with XAD-7 resin. The study was carried out using the example of Cr(VI) determination by adsorption stripping voltammetry (AdSV). Measurements were carried out using a solution containing Cr(VI), acetate buffer (pH = 6.2), DTPA, KNO3, and different surfactants. Ten mL of the solution was mixed with 0.5 g of XAD-7 resin at different temperatures for 5 min prior to voltammetric measurement. The effect of the mixing temperature of the sample with the resin on the voltammetric Cr(VI) signal in the presence of different surfactants was studied in the range from 20 to 60 °C. The proposed method of removing interference from surfactants by mixing the sample with the XAD-7 resin at 60 °C was used for the determination of trace amounts of Cr(VI) in river water containing non-ionic, anionic, cationic surfactants, and biosurfactants.
Reference37 articles.
1. Preconcentration of contaminants in water analysis;Bruzzoniti;J. Chrom. A,2000
2. Borah, P., Kumar, M., and Devi, P. (2020). Types of inorganic pollutants: Metals/metalloids, acids, and organic forms. Inorganic Pollutants in Water, Elsevier.
3. Main Analytical Techniques Used for Elemental Analysis in Various Matrices;Helaluddin;Trop. J. Pharm. Res.,2016
4. Review—Voltammetric Sensors with Laterally Placed Working Electrodes: A Review;Porada;J. Electrochem. Soc.,2020
5. A review of the identification and detection of heavy metal ions in the environment by voltammetry;Lu;Talanta,2018