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	The use of composite graphite electrode for voltammetric determination of phenylglyoxylic acid Šenholdová, Z. ; Navrátil, Tomáš ; Shanmugam, K. ; Barek, J. ; Žák, J. A composite electrode prepared from graphite powder and epoxy resin was applied as a working electrode for the determination of phenylglyoxylic acid (one of the metabolites of styrene) in human urine. Cathodic differential pulse stripping voltammetry was used and optimum conditions have been found giving the limit of determination about 5 mg L-1. All results were compared with those obtained using hanging mercury drop electrode. For the confirmation of suggested mechanism of the electrochemical reaction the elimination voltammetry with linear scan was used. Detailed record
	Voltammetric determination of genotoxic compounds using solid amalgam electrodes Barek, J. ; Čížek, K. ; Fischer, J. ; Navrátil, Tomáš ; Josypčuk, Bohdan Possibilities of voltammetric determinations of genotoxic organic compounds for environmental purposes were studied. Traditional mercury electrode was replaced by solid amalgam electrodes. It is possible to conclude that the obtained results are comparable with those, obtained on other types of electrodes. Detailed record
	Voltammetric Determination of Cytostatic Using Silver Solid Amalgam Electrode Barek, J. ; Fischer, J. ; Konečná, B. ; Kratzer, J. ; Hrušková, M. ; Navrátil, Tomáš ; Novotný, Ladislav ; Josypčuk, Bohdan ; Zima, J. Modern polarographic and voltammetric methods at mercury meniscus-modified silver solid amalgam electrode (m-AgSAE) were proved to be suitable for the determination of a number of polarographically active cytostatic drugs. The voltammetric determination of 6-mercaptupurine (6-MP), 6-thioguanine (6-TG), Mitoxantrone (MX, CAS No.: 65271-80-9, CAS. Name: 1,4-Dihydroxy-5,8-bis[{2-[(2-hydroxyethyl)amino]ethyl}amino]-9,10-anthracenedione), and Doxorubicin (DR, CAS No.: 23214-92-8, CAS Name: (8S-cis)-10-[(3-Amino-2,3,6-trideoxy--L-lyxohexapyranosyl)oxy] - 7, 8, 9, 10 - tetrahydro-6, 8, 11-trihydroxy-8-(hydroxyacetyl)-1-methoxy-5,12-naphtacenedione) were studied. Detailed record
	Solid Amalgam Electrodes in Environmental Analysis Fischer, J. ; Barek, J. ; Navrátil, Tomáš ; Novotný, Ladislav ; Josypčuk, Bohdan ; Zima, J. Nitrated polycyclic aromatic hydrocarbons NPAH are well-known environmental carcinogens and are often used as model substances in various toxicological studies. The modern electroanalytical methods (differential pulse voltammetry (DPV) and adsorptive stripping voltammetry (AdSV)) using a mercury meniscus-modified silver solid amalgam electrode (m-AgSAE) are sensitive enough for the NPAH determination. Detailed record
	Composite Electrodes in Environmental Analytical Chemistry Barek, J. ; Navrátil, Tomáš ; Šebková, Světlana ; Kopanica, M. Composite electrodes offer potential advantanges compared with metallic or glassy carbon electrodes. It is possible to find their field of application in the theoretical research of processes on the electrode surface, but also in the analytical chemistry (determination of metal ions, halide ions, organic compounds, etc.). Detailed record
	Využití stříbrné amalgámové elektrody (m-AgSAE) a rtuťové kapkové elektrody (HMDE) pro voltametrické stanovení alizarinové chromové černi PT Šebková, Světlana ; Barek, J. ; Novotný, Ladislav Detailed record
	Analytické sledování rovnováhy v roztocích z podzemního vyluhování uranu (2. díl) Barek, J. ; Štulík, K. ; Feltl, L. ; Strauch, B. ; Hostomský, Jiří ; Nývlt, Jaroslav ; Zima, J. ; Rychnovský, P. ; Jelínek, I. ; Krenželok, M. Detailed record
	The Use of Amalgam Electrodes in Electrochemical Analysis of Azidothimidine in Remedy Form Pecková, K. ; Moreira, J. C. ; Josypčuk, Bohdan ; Navrátil, Tomáš ; Zima, J. ; Barek, J. Azidothymidine (3´-azido-3´-deoxythimidine, AZT, Zidovudin) is a nucleoside analog, derived from thimidine. This compound prohibids the replicatrion of HIV virus. The article deals with its voltammetric determination using mercury and silver solid amalgam electrode. The results are compared with those obtained using HPLC. Detailed record
	Voltammetric Determination Phenylglyoxylic Acid in Urine Using Graphite Composite Electrode Navrátil, Tomáš ; Šenholdová, Z. ; Shanmugam, K. ; Barek, J. ; Surovcová, H. Phenylglyoxylic acid is metabolized in human body from vinylbenzene (styrene) (from which polystyrene is produced). Presented work deals with determination of this metabolite in human urine using carbon composite electrode. In the article are compared the results of analysis of the certified material (urine), achieved on the mercury and on the carbon composite electrodes. Detailed record
	Ink Films from Carbon Powders on Conventional Solid Electrodes as Alternative Disposable Sensors Josypčuk, Bohdan ; Barek, J. ; Novotný, Ladislav Rozšíření rozsahu pracovních potenciálů pevných elektrod bylo docíleno jejich pokrytím filmem z polymeru obsahujícího vodivé částice (grafitu, skelného uhlíku, nanotub aj.). Takový film může obsahovat 70 - 90% skelného uhlíku a 30 - 10% polystyrenu (procenta hmotnostní). Film se 70 % skelného uhlíku se chová více jako soubor mikroelektrod; s 90 % - spíše jako klasická elektroda ze skelného uhlíku. S takovým filmem lze pracovat i celý den; pro odstranění filmu stačí otřít ho o filtrační papír. Pro oxidaci ferocenu, adeninu, guaninu a jiných látek byly použity filmy s různým obsahem skelného uhlíku na podložkách ze stříbrného pevného amalgamu, zlata a platiny. Detailed record

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