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@article{905596, author = {Kryštofová, Olga and Trnková, Libuše and Adam, Vojtěch and Zehnálek, Josef and Hubálek, Jaromír and Babula, Petr and Kizek, René}, article_number = {6}, keywords = {heavy metals; lead; cadmium; miniaturization; screen printed electrode; amperometry; voltammetry; plant; maize; sunflower; water}, language = {eng}, issn = {1424-8220}, journal = {Sensors}, title = {Electrochemical Microsensors for the Detection of Cadmium(II) and Lead(II) Ions in Plants}, volume = {10}, year = {2010} }
TY - JOUR ID - 905596 AU - Kryštofová, Olga - Trnková, Libuše - Adam, Vojtěch - Zehnálek, Josef - Hubálek, Jaromír - Babula, Petr - Kizek, René PY - 2010 TI - Electrochemical Microsensors for the Detection of Cadmium(II) and Lead(II) Ions in Plants JF - Sensors VL - 10 IS - 6 SP - 5308-5328 EP - 5308-5328 SN - 14248220 KW - heavy metals KW - lead KW - cadmium KW - miniaturization KW - screen printed electrode KW - amperometry KW - voltammetry KW - plant KW - maize KW - sunflower KW - water N2 - Routine determination of trace metals in complex media is still a difficult task for many analytical instruments. The aim of this work was to compare three electro-chemical instruments [a standard potentiostat (Autolab), a commercially available miniaturized potentiostat (PalmSens) and a homemade micropotentiostat] for easy to use and sensitive determination of cadmium(II) and lead(II) ions. The lowest detection limits (hundreds of pM) for both metals was achieved by using of the standard potentiostat, followed by the miniaturized potentiostat (tens of nM) and the homemade instrument (hundreds of nM). Nevertheless, all potentiostats were sensitive enough to evaluate contamination of the environment, because the environmental limits for both metals are higher than detection limits of the instruments. Further, we tested all used potentiostats and working electrodes on analysis of environmental samples (rainwater, flour and plant extract) with artificially added cadmium(II) and lead(II). Based on the similar results obtained for all potentiostats we choose a homemade instrument with a carbon tip working electrode for our subsequent environmental experiments, in which we analyzed maize and sunflower seedlings and rainwater obtained from various sites in the Czech Republic. ER -
KRYŠTOFOVÁ, Olga, Libuše TRNKOVÁ, Vojtěch ADAM, Josef ZEHNÁLEK, Jaromír HUBÁLEK, Petr BABULA and René KIZEK. Electrochemical Microsensors for the Detection of Cadmium(II) and Lead(II) Ions in Plants. \textit{Sensors}. 2010, vol.~10, No~6, p.~5308-5328. ISSN~1424-8220.
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