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  • 1 IPEN-CNEN/SP Divisão de Radioquimica, Instituto de Pesquisas Energéticas e Nucleares Caixa Postal 11049 Pinheiros São Pualo Brasil
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Abstract  

The determination of phosphorus in milk and bone samples by both radiochemical and instrumental neutron activation analysis is described. The radiochemical method consists of thermal neutron irradiation of samples and standards, sample dissolution, phosphorus precipitation as ammonium phosphomolyb-date, use of zinc holdback carrier and counting of the phosphorus-32 ß-activity. The instrumental method involves thermal neutron irradiation of samples and standards, waiting for a decay time and ß-counting. The methods were applied to commercial samples and reference materials.