el-Hallaq Y H, Gökmen I G, Aras N K, Gökmen A
Department of Chemistry, Middle East Technical University, Ankara, Turkey.
Analyst. 1992 Mar;117(3):447-51. doi: 10.1039/an9921700447.
A post-irradiation radiochemical separation technique was tested for the determination of selenium levels in diet samples, collected by using a duplicate portion technique, from both rural and urban population groups in Turkey. The technique involved sample irradiation, acid digestion, selective distillation, precipitation and filtration steps. During the separations it was possible to determine the yield of each sample using a stable selenium carrier. An average chemical yield of 71 +/- 3% was obtained for the radiochemical neutron activation analysis. For samples from urban and rural regions, the average selenium concentrations obtained were 0.14 +/- 0.04 and 0.07 +/- 0.02 mg kg-1, respectively. It was also possible to determine daily dietary selenium intakes, which were found to be 81 +/- 41 micrograms and 23 +/- 11 micrograms for the urban and rural groups, respectively. Although daily selenium intakes were found for a small number of subjects in this study, the separation technique developed can be used for determination of the selenium status in larger population groups.
采用辐照后放射化学分离技术，对通过双份样品采集技术从土耳其城乡人群中收集的饮食样本中的硒含量进行了测定。该技术包括样品辐照、酸消解、选择性蒸馏、沉淀和过滤步骤。在分离过程中，使用稳定的硒载体可以测定每个样品的产率。放射化学中子活化分析的平均化学产率为71±3%。对于城乡地区的样本，获得的平均硒浓度分别为0.14±0.04和0.07±0.02 mg kg-1。还可以测定每日膳食硒摄入量，城乡组分别为81±41微克和23±11微克。尽管本研究仅对少数受试者测定了每日硒摄入量，但所开发的分离技术可用于测定更大人群的硒状况。
