Preliminary observations on excretion of 37Ar from man following whole-body neutron activation--an indicator of total-body calcium.
Measurements of exhaled 37-Ar produced by total-body neutron irradiation of 40-Ca were used to determine total-body calcium in 16 human subjects. There was a good correlation between body calcium using the 30-min postirradiation breath sample of 37-Ar and body calcium determined by measurement of 49-Ca.
D000201:Activation Analysis / Q000379:methods; D000328:Adult; D000368:Aged; D001128:Argon / Q000032:analysis*; D001823:Body Composition; D002118:Calcium / Q000032:analysis*; D005260:Female; D006801:Humans; D012119:Respiration
D001128:Argon; D002118:Calcium