RESUMO
A group of 219 subjects of Slovak adults from both sexes were studied for potassium body content by measuring the whole body activity of naturally occurring 40K using a whole body counter. The average body potassium value is 1.68 +/- 0.33 g kg(-1) body weight for males and 1.60 +/- 0.30 g kg(-1) for females. For both sexes the average body content of K was 1.62 +/- 0.30 g kg(-1). The concentration of potassium varies inversely with age. The specific activity of 40K varies inversely with slenderness. The total body potassium varies directly with body-build index for males, while its value is essentially constant for young females and tends to decrease with body-build index for old females. The average annual dose from 40K is 150 +/- 30 microGy for males and 140 +/- 30 microGy for females. For both sexes the average annual dose is 142 +/- 30 microGy. Both total potassium body content and annual dose from 40K for older subjects are below the values reported by the UNSCEAR.
Assuntos
Radioisótopos de Potássio/análise , Potássio/análise , Contagem Corporal Total , Adolescente , Adulto , Idoso , Carga Corporal (Radioterapia) , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Valores de Referência , Eslováquia , SomatotiposRESUMO
For assessing the real exposure level of nickel in electrolytical nickel production workers we monitored the following indicators of Ni load. (a) Stationary air sampling of Ni, (b) personal air sampling of Ni, (c) urine Ni excretion determined on group basis, (d) the 4 hours specimen of Ni excretion determined on an individual basis. A tentative limit for Ni in urine, roughly corresponding to the MAC 0.05 mg/m3 was 12 micrograms/l Ni according to (c) and 30 micrograms/l Ni according to (d). The occupational exposure limit for Ni in urine accepted in Czechoslovakia is 30 micrograms/l Ni.
