Selenium concentration in human urine

In this work we have determined selenium concentration in urine in two groups of healthy subjects. Selenium content in the younger group, aged 11-15 years (n = 41), was 13.7 +/- 6.5 micrograms/g-1 creatinine. In the older group, aged 17-97 years (n = 62), slightly but statistically significant lower selenium concentration in urine (11.4 +/- 4.9 micrograms/g Ct, p less than 0.05) was found. We have also shown a significant difference in the excretion of the element between the group of boys and men (p less than 0.05). Concentration of selenium excreted in urine in the population of healthy people (11-97 years, n = 103) is 12.3 +/- 5.4 micrograms Se/g Ct.