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Home Georgian Technologies Synthetic Multielemental Samples for Activation Analysis

Synthetic Multielemental Samples for Activation Analysis

Description

Synthetic multielement standards made on the basis of phenolformaldehyde resol resin (PFS) are proposed for instrumental neutron activation analysis (INAA) of biological materials. Concentrations of microelements in the standards are comparable with those of biological materials, and analytical lines of the introduced elements can be resolved by semiconductor spectrometers. As compared with standards made on the basis of natural materials, PFS standards have high radiation and thermal stability, retain geometrical form, are convenient in use and can be reproduced in any composition and in any quantity.

Development of universal comparison standards for INAA of biological materials is an urgent problem. Existing nowadays the certified international standards on the basis of natural biological materials (NBI 1577, Bovine Liver, Bowen Kale) are inconvenient for serial INAA due to powder-like consistence, hygroscopic property, low thermal and radiation stability, impossibility of reproduction. These drawbacks are eliminated by using PFS standards with matrix consisting of carbon, nitrogen, oxygen that have nuclear characteristics close to those of biological materials. Microelements are introduced into the matrix in such a way that their final composition to be a solid solution in PF. This ensures an ideal homogeneity of microelements distribution in the synthetic standard volume. The main properties of polymeric standards are: high radiation and thermal stability (they withstand integral fluxes of reactor neutrons n×1019 neutron/cm2 and temperature 4000 C), mechanical strength, strict geometrical form, homogeneity of introduced elements, glassy surface of standards allowing the removal of surface contaminations, and convenience for serial INAA. A variety of standards have been made for INAA of biological materials for thermal neutron fluxes about n×1012 – n×1013 neutron/cm2 sec.

Innovative Aspect and Main Advantages

The proposed synthetic standards based on polymers have various elemental compositions and contain different mass fractions of introduced elements. They simulate the elemental composition of complex natural materials, are economical and convenient for INAA. Standards have radiation and thermal stability, mechanical strength, strict geometrical form, and homogeneous distribution of elements.

Areas of Application

INAA of medico-biological and biological objects, food, medical materials



Stage of Development

The samples are laboratory tested and covered by patent of Georgia.

Contact Details

Andronikashvili Institute of Physics
Adress: 6 Tamarashvili St. 0177 Tbilisi, Georgia
Contact person: Nanuli Bagdavadze
Tel: (+995 32) 39 6716
Fax: (+99532) 39 1494
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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