The Experts below are selected from a list of 2133 Experts worldwide ranked by ideXlab platform

M Ebihara - One of the best experts on this subject based on the ideXlab platform.

G Sestakov - One of the best experts on this subject based on the ideXlab platform.

  • rapid Radiochemical neutron activation analysis for lodine in urine by different Separation techniques
    Analyst, 1992
    Co-Authors: M Dermelj, A R Byrne, Zdenka Slejkovec, P Stegnar, S Hojker, M Porenta, G Sestakov
    Abstract:

    In the present work on Radiochemical neutron activation analysis for the determination of iodine in urine samples, the performance of three different Radiochemical Separation techniques, namely, direct extraction, use of an iodinated ion-exchange resin column and Schoniger combustion, were intercompared and validated. The practical advantages of the iodinated-resin technique make it most suitable for the rapid routine determination of iodine in urine. It was further verified by participation in an international intercomparison run of urine analysis, and used in a pilot study on iodine determination in the urine of 171 Slovenian schoolchildren, where it gave results in good agreement with the catalytic method.

M Dermelj - One of the best experts on this subject based on the ideXlab platform.

  • 81mse tracer for determination of the chemical yield in Radiochemical neutron activation analysis of selenium
    Journal of Radioanalytical and Nuclear Chemistry, 1994
    Co-Authors: Vekoslava Stibilj, M Dermelj, A R Byrne
    Abstract:

    A radiotracer method is described for measurement of the chemical yield in Radiochemical neutron activation analysis of selenium using the75Se (120 d) induced nuclide. It is based on81mSe (57 min) radioisotopic tracer, prepared immediately before its use in the Radiochemical Separation procedure, by neutron irradiation of highly enriched80Se. The recovery of selenium is calculated from the 103 keV ψ-peak of81mSe in the separated selenium fraction used for quantitation of75Se. The technique is illustrated by results for biological reference materials of good accuracy and reproducibility.

  • rapid Radiochemical neutron activation analysis for lodine in urine by different Separation techniques
    Analyst, 1992
    Co-Authors: M Dermelj, A R Byrne, Zdenka Slejkovec, P Stegnar, S Hojker, M Porenta, G Sestakov
    Abstract:

    In the present work on Radiochemical neutron activation analysis for the determination of iodine in urine samples, the performance of three different Radiochemical Separation techniques, namely, direct extraction, use of an iodinated ion-exchange resin column and Schoniger combustion, were intercompared and validated. The practical advantages of the iodinated-resin technique make it most suitable for the rapid routine determination of iodine in urine. It was further verified by participation in an international intercomparison run of urine analysis, and used in a pilot study on iodine determination in the urine of 171 Slovenian schoolchildren, where it gave results in good agreement with the catalytic method.

K. Komura - One of the best experts on this subject based on the ideXlab platform.

  • low level measurement of the cosmogenic 22na radionuclide in fresh water by ultra low background gamma ray spectrometry after simple Radiochemical Separation
    Journal of Radioanalytical and Nuclear Chemistry, 2003
    Co-Authors: A Sakaguchi, Masayoshi Yamamoto, Yoshihito Ohtsuka, Keiichi Sasaki, K Yokota, K. Komura
    Abstract:

    A simple analytical method was developed for the determination of cosmogenic 22Na radionuclide in fresh water samples by ultra low-background g-ray spectrometry after Radiochemical Separation. The method consists in pre-concentration of 22Na(Na) by a ion exchange resin column from a large volume of ca. 500-liter water samples, elution with 4M HCl from the resin, and removal of the main metal components such as Ca and Mg as carbonate precipitates and of 40K(K) as potassium tetraphenylborate K[B(C6H5)4]. The obtained 22Na fraction was successfully measured by an ultra low-background Ge detector installed in the Ogoya Underground Laboratory.

  • Determination of low-level ^54Mn in soils by ultra low-background gamma-ray spectrometry after Radiochemical Separation
    Journal of Radioanalytical and Nuclear Chemistry, 2002
    Co-Authors: Y. Murata, M. Yamamoto, K. Komura
    Abstract:

    An analytical method was developed for the measurement of low-level ^54Mn in soil sample by ultra low-background g-ray spectrometry after Radiochemical Separation. The method consists of decomposition of sample by a mixture of HNO_3 and HF, dissolution by HNO_3, precipitation as hydroxide, solvent extraction with diisopropyl ether and anion exchange. Finally, for purification of Mn it was precipitated as MnO_2 by adding KClO_3. ^54Mn in the precipitate was measured by ultra low-background well-type Ge detector at Ogoya Underground Laboratory. Measurements of ^54Mn using 30-200 g of soil samples from the JCO grounds were successfully performed by the present method. The minimum detectable activity of ^54Mn was about 0.01 dpm (0.2 mBq) for a 7-day counting period.

H Minowa - One of the best experts on this subject based on the ideXlab platform.