The objective of this investigation was to verify the degradation of endrin by gamma irradiation. 60Co was used as radiation source for irradiation of 50 mg L−1 endrin with a varied dose of 1–6 kGy. High performance liquid chromatography (HPLC) coupled with diode array detector was
used as an analytical technique to monitor the degradation rate along with numbers of degradation products formed. At dose
rate of 6 kGy ≥99% of endrin was degraded. It is proposed that utilization of ionization radiations can be an effective and
efficient tool for the removal of halogenated pesticides.
For the determination of trace elements in neutron irradiated, selenium by gamma-ray spectrometry the separation of the matrix
activity is often necessary. In model experiments the decontamination of cation and anion impurities from the matrix solution
was investigated by the counter current ion migration. After a processing of 3 hrs the trace activities of Co, Cr, Ga, Na
and Zn were decontaminated from Se with a factor of >103. For the trace elements As and Te representing the anionic constituents, a decontamination factor of 3·102 was obtained.
Authors:M. Bounakhla, K. Embarch, F. Zahry, E. Bilal, and P. Kump
Elemental analyses of 10 geological samples from Morocco and some Standard Reference Materials were performed by Energy Dispersion
X-Rays Fluorescence, Wavelength Dispersion X-Rays Fluorescence and Neutron Activation Analysis techniques in order to assess
the accuracy and sensitivity of the concentrations determined with regard to requirements in geochemical exploration. The
possibilities of utilization of EDXRF as an appropriate and economic technique for the analysis of various elements which
are important in interpretation of geochemical data were evaluated.