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Boron filter with 500 mg/cm2 surface density has been constructed and used for epithermal neutron activation analysis of geological and biological materials. Bare and boron-covered irradiations were performed to determine the boron activation ratios (R B) and improvement factors (IF B) for 23 nuclides. Biological and geological SRMs were also analyzed to demonstrate the practical use of this technique. Experiments have proved that epiboron activation extends the applicability of NAA to samples with unfavorable matrices (i.e., Na, Ca, P, Sc, etc.).

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Acta Chromatographica
Authors: É. Szőke, G. Petroianu, K. Tekes, B. Benkő, P. Szegi, R. Laufer, and G. Veress


Reversed-phase HPLC has been used to monitor the concentration of the two major Chamomile components rutin and quercetin during rat liver microsomal treatment. The possibility of microsomal oxidative metabolism or stability of these two components was examined using a guard-column without any clean-up. The concentration of quercetin decreased when exposed to rat liver microsomal media whereas the rutin concentration did not change significantly over one hour of treatment.

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