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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 a René KIZEK. Electrochemical Microsensors for the Detection of Cadmium(II) and Lead(II) Ions in Plants. \textit{Sensors}. 2010, roč.~10, č.~6, s.~5308-5328. ISSN~1424-8220.
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