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	Silver Amalgam Electrodes in Electroanalysis of Selected Agrochemicals Daňhel, Aleš ; Barek, Jiří (advisor) ; Vytřas, Karel (referee) ; Ludvík, Jiří (referee) 4 ABSTRACT Development and testing of novel non-toxic electrode materials, detection arrangements and analytical methods applicable in determination of selected agrochemicals is the main aim of this Ph.D. Thesis. New working electrodes based on silver solid amalgam paste (AgSA-PE) with organic pasting liquid and other based on crystallic silver amalgam (CAgAE) were developed, their electrochemical behaviour investigated and further used in voltammetric determination of widespread and toxic environmental pollutant 4-nitrophenol (4-NP). This analyte could be determined by DPV at AgSA-PE with limit of detection (LD) 1×10í6 mol lí1 and using CAgAE with LD 4×10í7 mol lí1 , both in 0.2 mol lí1 acetate buffer pH 4.8. Attempts to decrease LDs by utilization of adsorptive stripping voltammetry were not successful in either case. Crystallic silver amalgam was also successfully used for construction of microcylindric flow-through cell and tested for amperometric determination of nitrophenol mixture in HPLC-ED system. Both novel electrodes were found to be suitable alternatives to toxic mercury electrodes and the CAgAE seems to be promising working electrode for flowing systems. Method for sample preparation and voltammetric determination of broad-spectrum herbicide Glyphosate in contaminated soil samples was also... Detailed record
	Electrochemical behaviour of metallothioneins on silver amalgam electrodes Šestáková, Ivana ; Josypčuk, Bohdan Three different types of silver amalgam electrodes (p-AgSAE - polished silver solid amalgam electrode, m-AgSAE - mercury meniscus modified silver solid amalgam electrode and AgA-PE - silver amalgam paste electrode) were applied for voltammetric detection of metals bound in metallothionein (MT) molecule and for Brdička reaction with Co(III). The signals obtained with m-AgSAE and silver amalgam paste electrode correspond to signals observed on hanging mercury drop electrode (HMDE). Only p-AgSAE exhibits different behavior which is explained by the formation of AgMT. Formation of AgMT was demonstrated by dissapearance of Cd-Zn-MT peaks and by the increase of new peaks at -573 and -1050 mV, observed by differential pulse voltammetry on HMDE, when silver ions in excess were added to the Cd-Zn-MT solution. 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

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