Voltammetric Determination of Cr(VI) in the Presence of Cr(III) with Application of CDTA as a Masking Agent

• Autorzy: Grabarczyk M. , Kaczmarek Ł. , Korolczuk M.
• Języki publikacji: EN

Abstrakty

EN

A selective and sensitive method for determination of traces of Cr(VI) in the presence of a large excess of Cr(III) by differential pulse adsorptive stripping voltammetry is presented. For minimization of Cr(III) interference cyclohexanediaminetetraacetic acid (CDTA) was used as a masking agent. The determinations were performed in a flow system. The calibration graph is linear from 5×10-10 to 2×10-8 mol l-1 for accumulation time 60 s. The relative standard deviation for 1×10-8 mol l-1Cr(VI) is 5.8%(n = 5). The detection limit for an accumulation time of 60 s is 2×10-10 mol l-1. The influence of common foreign ions is also presented. The validation of the method was made by comparing the analytical results for water and soil samples with those obtained by reference methods and by a recovery test for river water.

Słowa kluczowe

EN

determination; chromium(VI); stripping voltammetry; CDTA; flow system

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2004
• Tom: Vol. 78 / nr 9
• Strony: 1627--1634
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Grabarczyk M.

• Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031 Lublin, Poland

autor

Kaczmarek Ł.

• Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031 Lublin, Poland

autor

Korolczuk M.

• Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031 Lublin, Poland

Bibliografia

• 1. Milacic R., Stupar J., Kożuch N. and Korosin J., Analyst, 117, 125 (1992).
• 2. Boussemart M., van den Berg C.M.G. and M. Ghaddaf M., Anal. Chim. Acta, 262, 103 (1992).
• 3. Li Y. and Xue H„ Anal. Chim. Acta, 448, 121 (2001).
• 4. Souza E.M., Wagener A.L. and Farias P., Croat. Chem. Acta, 70,259 (1997).
• 5. Elleout C., Quentel F. and Madec Ch., Anal. Chim. Acta, 257, 301 (1992).
• 6. Scholz F., Lange B., Draheim M. and Pelzer J., Fresenius J. Anal. Chem., 338, 627 (1990).
• 7. Korolczuk M. and Grabarczyk M., Anal. Chim. Acta, 387,97 (1999).
• 8. Korolczuk M., Electroanalysis, 11, 1218 (1999).
• 9. Dominguez O., Sanllorente S., Alonso M.A. and Arcos M.J., Electroanalysis, 13, 1505 (2001).
• 10. Dominguez O. and Arcos M.J., Anal. Chim. Acta, 470,241 (2002).
• 11. Golimowski J., ValentaP. andNumberg H.W., Fresenius Z. Anal. Chem., 322, 315 (1985).
• 12. Timerbaev A.R., Semenova O.P., Buchberger W. and Bonn G.K., Fresenius J. Anal. Chem., 354, (1996).
• 13. Poboży E., Wojasińska E. and Trojanowicz M., J Chromatogr. A, 736, 141 (1996).
• 14. Padarauskas A. and Schwedt G., Talanta, 42,693 (1995).
• 15. Sander S. and Koschinsky A., Mar. Chem., 71, 83 (2000).
• 16. Grabarczyk M. and Korolczuk M., Anal. Bioanal. Chem., 376,1115 (2003).
• 17. US Environmental Protection Agency (EPA), Test Methods for Evaluating Solid Waste, Method 306 Alkaline digestion for Hexavalent Chromium, US Government Printing Office, Washington, DC, 19!
• 18. James B.R., J. Environ. Qua!., 23,227 (1994).
• 19. Eckert J.M., Stewart J.J., Waite T.D., Szymczak R. and Williams K.L., Anal. Chim. Acta, 236, (1990).
• 20. Nakayama E., Kuwamoto T., Tsurubo S. and Fujinaga T., Anal. Chim. Acta, 130,401 (1981).
• 21. Wittbrodt P.R. and Palmer C.D., Europ. J. Soil Sci., 47, 151 (1996).