5/2010 Sensing in Electroanalysis
https://hdl.handle.net/10195/38130
2024-03-28T14:02:21ZAmperometric and spectrophotometric detection of aminobiphenyls and aminonaphthalenes in HPLC
https://hdl.handle.net/10195/38259
Amperometric and spectrophotometric detection of aminobiphenyls and aminonaphthalenes in HPLC
Zavázalová, Jaroslava; Dejmková, Hana; Ramešová, Šárka; Barek, Jiří; Pecková, Karolina
A new method for the determination of selected aminobiphenyls (ABs)
and aminonaphthalenes (ANs), proved or suspected carcinogens and mutagens, was
developed using reversed-phase HPLC coupled to an amperometric platinum tubular
detector and a spectrophotometric detector. Using mobile phase consisting of
acetonitrile and phosphate buffer pH 2.5 (40:60, v/v), separation of 2- and
4-aminobiphenyl and 1- and 2-aminonaphthalene was achieved within 10 min and
limits of determination between 3·10–8 mol L–1 and 8·10–8 mol L–1 were obtained for
amperometric detection. In comparison with spectrophotometric detection, it is
superior in both sensitivity and selectivity. The developed method was applied on the
analysis of spiked samples of urine. Solid phase extraction was used for a preliminary
separation and preconcentration of the tested analytes, leading to the decrease of
limits of determination to the values between 7.2·10–9 mol L–1 and 2.7·10–8 mol L–1.
2010-01-01T00:00:00ZPossibilities and limitations of ionic liquids in electrochemical and electroanalytical measurements (a review)
https://hdl.handle.net/10195/38258
Possibilities and limitations of ionic liquids in electrochemical and electroanalytical measurements (a review)
Weidlich, Tomáš; Stočes, Matěj; Švancara, Ivan
A review (with 155 refs.) concerning the current achievements and typical
trends in the chemistry of (room temperature) ionic liquids, (RT)ILs, with particular
emphasis on their applicability in electrochemical and electroanalytical measurements.
The latter is documented on a rapid progress of ionic liquid-modified carbon
paste electrodes (IL-CPEs), the so-called carbon ionic liquid electrodes (CILEs), and
related configurations in the last half-decade, within the period of 2005-2010.
2010-01-01T00:00:00ZSilver amalgam electrodes – a look back at the last five years of their development and applications
https://hdl.handle.net/10195/38257
Silver amalgam electrodes – a look back at the last five years of their development and applications
Vyskočil, Vlastimil; Daňhel, Aleš; Fischer, Jan; Novotný, Vít; Deýlová, Dana; Horáková, Eva; Barek, Jiří; Yosypchuk, Bogdan; Wang, Joseph
Different types of silver amalgam electrodes have been introduced as
modern and promising replacements for traditional mercury electrodes. Advantages
and possibilities of these novel electrode materials were highlighted and demonstrated
at a number of sensitive voltammetric and amperometric (HPLC, flow injection
analysis) methods developed in our UNESCO Laboratory of Environmental
Electrochemistry in the last five years. The determined analytes were hazardous
organic chemical carcinogens and genotoxic environmental pollutants, pesticides,
antitumor, antibiotic and antivirotic drugs, and explosives containing
electrochemically reducible nitro, nitroso, azido, and oxo groups.
2010-01-01T00:00:00ZWood-free resin pencil as low-cost electrode for pH measurements
https://hdl.handle.net/10195/38256
Wood-free resin pencil as low-cost electrode for pH measurements
Urbanová, Veronika; Bartoš, Martin; Borecká, Daniela; Vytřas, Karel
We report on possible use of wood-free resin pencil (WPE) as low-cost pH
electrode based on WPE coated by antimony or bismuth film as the main pH sensitive
material. Sensors prepared allowed to measure pH in the range of 3-10 and 10-13.
The pH electrodes proposed can take advantage in strong alkaline and corrosive
systems where the use of traditional glass electrode is limited. Also, they can serve as
the low-cost indicator electrodes in acid-base titrations.
2010-01-01T00:00:00Z