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The study deals with the application of multicommutation flow analysis for determination of Cr(III) concentration in environmental samples at a trace level. The detection method was based on the luminol-H2O2 chemiluminescence reaction in basic aqueous solution using Cr(III) ions as a catalyst. The experimental part of investigation focused on the optimization of equipment conditions, i.e. reagent flow rate, injected sample volume and the work of solenoid valves. The specificity of the method was tested with respect to selected heavy metal ions. The presented method allowed determination of Cr(III) over the range from 2.5 to 50ng*cm-3, with a low detection limit (under optimum conditions: 0.15ng*cm-3). Multicommutation is one of the best methods of analytical procedure automation. The main advantages of multicommutation method, compared with classical flow injection analysis (FIA), is the ability to achieve more repeatable analytical signal, which in turn allows to improve the method precision (relative standard deviation, RSD, was 1.8% for 10 determinations of 20ng*cm-3 Cr(III)). Moreover, it is excellent from the point of view of environmental protection because it offers very low reagent consumption: luminol 0.26; H2O2 2.16; sample 0.15 (cm3 per peak). The sampling rate was about 90 samples*h-1.
Czasopismo
Rocznik
Tom
Strony
25--31
Opis fizyczny
Bibliogr. 16 poz., rys., tab., wykr.
Twórcy
autor
autor
- University of Warmia and Mazury in Olsztyn, Department of Chemistry, 10-957 Olsztyn, Poland, stankor@uwm.edu.pl
Bibliografia
- Andersen, J.E.T. 1998. Introduction of hydrogen peroxide as an oxidant in flow injection analysis: speciation of Cr(III) and Cr(VI). Analytica Chimica Acta 361: 125-131.
- Catala Icardo, M., J.V. Garcia Mateo, J. Martinez Calatayud. 2002. Multicommutation as a powerful new analytical tool. Trends in Analytical Chemistry 21: 366-378.
- Chen, Z., R. Naidu, A. Subramanian. 2001. Separation of chromium (III) and chromium (VI) by capillary electrophoresis using 2,6-pyridinedicarboxylic acid as a pre-column complexation agent. Journal of Chromatography A 927: 219-227.
- Escobar, R., M.S. Garcia-Dominguez, A. Guiraum, F.F. de la Rosa. 1998. Determination of Cr(III) in urine, blood serum and hair using injection chemiluminescence analysis. Fresenius Journal of Analytical Chemistry 361: 509-511.
- Escobar, R., Q. Lin, A. Guiraum, F.F. de la Rosa. 1993. Flow injection chemiluminescence method for the selective determination of chromium(III). Analyst 118: 643-647.
- Escobar, R., Q. Lin, A. Guiraum, F.F. de la Rosa. 1995. Determination of trivalent and hexavalent chromium in waste water by flow injection chemiluminescence analysis. Journal of Environmental Analytical Chemistry 61: 169-175.
- Gammelgaard, B., Y.-P. Liao, O. Jons. 1997. Improvement on simultaneous determination of chromium species in aqueous solution by ion chromatography and chemiluminescence detection. Analytica Chimica Acta 354: 107-113.
- Girard, L., J. Hubert. 1996. Speciation of chromium (VI) and total chromium determination in welding dust samples by flowinjection analysis coupled to atomic absorption spectrometry. Talanta 43: 1965-1974.
- Moliner-Martinez, Y., S. Meseguer-Lloret, L.A. Tortajada-Genaro, P. Campins-Falco. 2003. Influence of water sample storage protocols in chemiluminescence detection of trace elements. Talanta 60: 257-268.
- Nriagu, J.O., E. Nieboer. 1988. Chromium in the Natural and Human Environment. Wiley, New York.
- Pantsar-Kallio, M., P.K.G. Manninen. 1996. Speciation of chromium in aquatic samples by coupled column ion chromatographyinductively coupled plasma-mass spectrometry. Analytica Chimica Acta 318: 335-343.
- Powell, M.J., D.W. Boomer, D.R. Wiederin. 1995. Determination of chromium species in environmental samples using high-pressure liquid chromatography direct injection nebulization and inductively coupled plasma mass spectrometry. Analytial Chemistry 67: 2474-2478.
- Rocha, F.R.P., B.F. Reis, E.A.G. Zagatto, J.L.F.C. Lima, R.A.S. Lapa, J.L.M. Santos. 2002. Multicommutation in flow analysis: concepts, applications and trends. Analytica Chimica Acta 468: 119-131.
- Seitz, W.R., W.W. Suydam, D.M. Hercules. 1972. Determination of trace amounts of chromium(III) using chemiluminescence analysis. Analytical Chemistry 44: 957-963.
- Tortajada-Genaro, L.A., P. Campins-Falco, F. Bosch-Reig. 2001. Calibration transfer in chemiluminescence analysis. Application to chromium determination by luminol-hydrogen peroxide reaction. Analytica Chimica Acta 446: 385-392.
- Yang, W.-P., Z.-J. Zhang, W. Deng. 2003. Speciation of chromium by in-capillary reaction and capillary electrophoresis with chemiluminescence detection. Journal of Chromatography A 1014: 203-214.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BAR0-0062-0064