RESUMO
Antimony was preconcentrated from natural waters on thionalide-loaded acrylic polymer (Bio-Beads SM-7) from 0.5 m HCl solution. Prior to the preconcentration, Sb(V) was reduced to Sb(III) with potassium iodide. The antimony retained on the resin was determined by neutron activation and gamma-spectrometric measurement of 122Sb (564 keV). The lower limit of detection was 0.023 micrograms/L for a 100-mL sample.
Assuntos
Antimônio/análise , Água Doce/análise , Quelantes , Indicadores e Reagentes , Análise de Ativação de Nêutrons , Polônia , Iodeto de Potássio , Radioisótopos , Espectrometria gama , Compostos de SulfidrilaRESUMO
In 95 healthy subjects including 55 women and 40 men the serum levels of Ag, Co and Cr were determined by means of neutron activation analysis using the method of gamma spectrometry without separation of different elements from the sample. It was found that people aged over 60 years had higher serum silver levels than younger subjects. In women a statistically significantly higher serum cobalt level was demonstrated in relation to men. Men and women aged over 60 years had serum chromium levels very similar while women aged below 60 years had lower serum chromium levels.
