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  • Author or Editor: E. Havránek x
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Abstract  

The applicability of two nuclear analytical methods for the determination of hepatacaine hydrochloride in solution was studied, i. e. radionuclide X-ray fluorescence analysis and radiometric titrations based on precipitate formations. Methods used were evaluated on the basis of obtained sensitivity values.

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Abstract  

Methods of sample treatment in XRF analysis of hair are studied in view of the effect on analytical results. A new method is proposed based on the incomplete ashing of hair followed by pellet preparation. Its suitability is estimated on the XRF analysis of real hair samples collected from 4 healthy adults.

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Abstract  

A photon-induced X-ray fluorescence method, which allows the simultaneous determination of iron, copper, zinc, bromine and rubidium in human blood and blood plasma samples is described. The method is reliable and has a good sensitivity for a wide range of elements.

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Abstract  

Determination of Mn, Fe, Ni, Cu, Zn and Pb in human soft tissues by radionuclide X-ray fluorescence analysis /using238Pu and109Cd sources/ is described.

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Abstract  

Determination of Mn, Fe, Cu, Zn, Hg, Pb, Br, Se, Rb, Sr and Cd in the medicinal plants by radionuclide X-ray fluorescence analysis (using238Pu,241Am/Ag and125I) is described.

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Abstract  

The radionuclide X-ray fluorescence analysis was used for the determination of Fe, Zn, Br and Rb levels in whole blood from dilated cardiomyopathy patients and matched control subjects (from Bratislava). The XRF-system consisted of a radionuclide source109Cd, a semiconductor Si/Li detector connected to a multichannel analyzer.

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Abstract  

This paper aimed to the evaluation of different kinds of sorbent material preparation and to the evaluation of their characteristics at different pH conditions by X-ray fluorescence analysis. This method is suitable for identification and determination of elements in samples of different character, state and origin because it is a polycomponent, non-destructive, fast and simple analytical method. Moreover, it allows time-advantageous and reliable measurements. This paper studies problems concerning the determination of some selected elements (Mn, Fe, Ni, Cu, Zn, Pb) in pharmaceutical samples of sodium chloride in the solid state as well as in its solution by sorption on chelating extraction membrane 3M Empore™ and on the strongly acidic ion-exchanger Dowex 50Wx8. Conditions for the most effective sorption of determined elements are also interpreted.

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Abstract  

Biodistribution of EDTA derivatives99mTc-Sn-DOTA, DDDTA, DHDTA /1,2-dinitriloalkane-tetraacetic acids/ individually and bound to liposome in rats is described. The obtained results are compared with99mTc-Sn-EDTA.

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Abstract  

The preparation of99mTc-complexes with nine derivatives of (4R)-1,3-thiazolidine-4-carboxylic acid over a broad pH range is described. The labeling efficiency of all compounds was checked by paper- and thin layer chromatography. Paper electrophoresis and gel chromatography indicated the presence of two types of99mTc-complexes differing in charge and molecular size. Preliminary results of the biodistribution of anionic complexes in mice are given. The structure of both types of the Tc-complexes is also discussed.

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