The purpose of this study was to test a method for 99Tc determination in soil samples from locality Bratislava Podunajske Biskupice by using solid phase extraction technique with
a new sorbent AnaLig® Tc-02—molecular recognition technology product. The method is suitable for analyzing soil samples in a relatively short time
and high recoveries. The use and effectiveness of AnaLig® Tc-02 were successfully tested by analysis of soil and spiked soil samples.
Two separation techniques for strontium determination using AnaLig® Sr01 molecular recognition technology and extraction chromatography Sr® resin were tested. The methods performance was investigated by analysis of NPL (High Alpha–Beta 2003) intercomparison sample.
The results obtained for both procedures were compared in terms of activities and recoveries. Data analysis proved a good
agreement with the reference values. The AnaLig® Sr01 separation method for 90Sr determination was successfully validated with the same performance as the Sr® resin method.
Two separation techniques for plutonium determination using IBC′S AnaLig® Pu02 molecular recognition technology product (MRT) and extraction chromatography TRU® resin (Eichrom ®Industries) to effectively and selectively separate and recover plutonium were tested. The performance of the methods was
successfully tested by analysis of NPL (High Alpha–Beta 2003, 2005) intercomparison sample and radioactive sludge sample from
NPP A1 Jaslovské Bohunice with high activities of the plutonium radionuclides. The results obtained for both procedures were
compared in terms of activities and recoveries.
Procedure for analysis of plutonium isotopes in soil samples was developed using a new molecular recognition technology product
AnaLig®Pu-02 gel. Extraction chromatography TEVA® Resin was used for purification of plutonium phase to remove thorium impurities which interfere in Pu determination by alpha
spectrometry. The performance of the method was successfully tested by analysis of a sand stimulant sample and a soil sample
spiked with known activity of 239Pu. The results obtained for procedures were compared in terms of activities and recoveries.
Two separation techniques for plutonium determination using AnaLig® Pu02 molecular recognition technology product (MRT) and extraction chromatography TRU® resin were tested. The methods performance was investigated by analysis of National Physical Laboratory (NPL-Alpha-Beta High,
ABH 2003, 2005) intercomparison test samples. The results obtained for both procedures were compared in terms of activities
and recoveries. Data analysis showed good agreement with the reference values. The AnaLig® Pu02 separation method for 239,240Pu, 238Pu determination was successfully validated with the same performance as the TRU® resin method.
formation of D-mannonaphto-18-crown-6-ether
1 with D- and L-phenylalanine
(Phe) and their derivatives was studied using conduction and titration microcalorimetry
in aqueous solution, and solvent–solvent (water–chloroform) extraction.
The thermal effects accompanying the complexation process were determined,
but the chiral recognition effects were very small. The chiral differentiation
of amino acid was observed in the experiments of the extraction from water
to chloroform phase containing chiral receptor.
We studied the use of an extraction chromatography for determination of 90Sr in contaminated water samples. The aim of our work was to compare selected products from the point of view of the strontium
chemical yields and analysis time. Three commercial products, 3M Empore™ Strontium Rad Disk, AnaLig® Sr-01 gel, Sr®Resin, and two classical methods, liquid–liquid extraction with tributhylphosphate and carbonate co-precipitation, were tested
for the separation of 90Sr. The water sample from nuclear power plant A1 Jaslovske Bohunice was used for radiochemical analysis of 90Sr volume activity. Samples were traced with 85Sr to monitor strontium chemical recovery and counted either by Cerenkov counting on TRI CARB 2900 TR liquid scintillation
counter or low level alpha–beta proportional counter.
The enthalpies of transfer 2-propanol, 1,2-butanediol (BD) and 1-hexanol from aqueous to aqueous α-cyclodextrin (CD) solutions
have been determined by microcalorimetry at various mole fractions at 298.15 K. To clarify stabilities of inclusion complexes
in aqueous solutions, hydration Gibbs energies calculation of inclusion complex of CD-alcohol were performed by using the
molecular mechanics with the MMFF94s force field in the generalized born/surface area (GB/SA) model. The largest stabilization
in Gibbs energy is obtained by the hydration (ΔhydH) of α-CD-1,2-butanediol complex among α-CD-butanediol isomers complexes.
The enthalpies, entropies and Gibbs energies of inclusion of dl-1,3-, 1,4- and meso-2,3-butanediols into α- and β-cyclodextrin cavities from ideal gas phase have been determined on the basis of newly obtained
experimental data of the butanediols. The butanediol molecules are stabilised strongly in the cavities due to interactions
with inner walls of the cavities. Entropies of the gaseous isomers are greatly decreased in the cavities. The largest decrease
is obtained for the case of 2,3-BD. Discussions concerning the1,4-butanediol given in the preceding paper have been changed
due to the adoption of new data on the butanediols.
Two commercial products—molecular recognition technology (MRT) product AnaLig®Tc-02 gel and extraction chromatography TEVA® resin were successfully tested for the separation of 99Tc. The results obtained for both procedures were compared in terms of activities and recoveries. The demonstrated linear
model clearly proves that the residua fulfill the Gaussian model, without any autocorrelation and trend for NPL Alpha–Beta
high 2003 intercomparison reference sample.