Electrochemical Microsensors for the Detection of Cadmium(II) and Lead(II) Ions in Plants

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. Sensors. 2010, vol. 10, No 6, p. 5308-5328. ISSN 1424-8220.

Basic information

• Original name: Electrochemical Microsensors for the Detection of Cadmium(II) and Lead(II) Ions in Plants
• Authors: KRYŠTOFOVÁ, Olga (203 Czech Republic), Libuše TRNKOVÁ (203 Czech Republic, belonging to the institution), Vojtěch ADAM (203 Czech Republic), Josef ZEHNÁLEK (203 Czech Republic), Jaromír HUBÁLEK (203 Czech Republic), Petr BABULA (203 Czech Republic) and René KIZEK (203 Czech Republic, guarantor).
• Edition: Sensors, 2010, 1424-8220.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10405 Electrochemistry
• Country of publisher: Switzerland
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 1.774
• RIV identification code: RIV/00216224:14310/10:00051499
• Organization unit: Faculty of Science
• UT WoS: 000279202100002
• Keywords in English: heavy metals; lead; cadmium; miniaturization; screen printed electrode; amperometry; voltammetry; plant; maize; sunflower; water
• Tags: AKb, rivok

Abstract

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.

Links

• MSM0021622412, plan (intention): Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)