title: Determination of impurities in (124)I samples by high resolution gamma spectrometry.
abstract: (124)I is a radionuclide used in the diagnosis of tumors. The National Health Agency requires identification and activity measurement of impurities. Using gamma spectrometry with an efficiency calibrated high-purity germanium detector, impurities (125)I and (126)I in an (1)(24)I production sample were identified. Activity ratios of (125)I and (126)I to (124)I were approximately 0.5% and 98%, respectively.
authors.affiliation: LNMRI, IRD, Comissão Nacional de Energia Nuclear, Av Salvador Allende, S/N, RJ CEP 22783-127, Brazil. Electronic address: marcandida@yahoo.com.br.
authors.forename: M C M
authors.initials: MCM
authors.lastname: de Almeida
authors.affiliation: Instituto de Radioproteção e Dosimetria, RJ, Brazil.
authors.forename: R L
authors.initials: RL
authors.lastname: da Silva
authors.affiliation: Instituto de Radioproteção e Dosimetria, RJ, Brazil.
authors.forename: J U
authors.initials: JU
authors.lastname: Delgado
authors.affiliation: Instituto de Radioproteção e Dosimetria, RJ, Brazil.
authors.forename: R
authors.initials: R
authors.lastname: Poledna
authors.affiliation: Instituto de Radioproteção e Dosimetria, RJ, Brazil; Laboratório de Instrumentação Nuclear (LIN/PEN/COPPE/UFRJ), Caixa Postal 68509, CEP 21945-970 RJ, Brazil.
authors.forename: M T F
authors.initials: MTF
authors.lastname: de Araújo
authors.affiliation: Instituto de Radioproteção e Dosimetria, RJ, Brazil.
authors.forename: A S
authors.initials: AS
authors.lastname: Laranjeira
authors.affiliation: Instituto de Radioproteção e Dosimetria, RJ, Brazil.
authors.forename: E
authors.initials: E
authors.lastname: de Veras
authors.affiliation: Instituto de Engenharia Nuclear, RJ, Brazil.
authors.forename: A M S
authors.initials: AMS
authors.lastname: Braghirolli
authors.affiliation: Instituto de Engenharia Nuclear, RJ, Brazil.
authors.forename: G R
authors.initials: GR
authors.lastname: Dos Santos
authors.affiliation: Laboratório de Instrumentação Nuclear (LIN/PEN/COPPE/UFRJ), Caixa Postal 68509, CEP 21945-970 RJ, Brazil.
authors.forename: R T
authors.initials: RT
authors.lastname: Lopes
mesh_terms: D001938:Brazil; D004340:Drug Contamination / Q000517:prevention & control*; D007457:Iodine Radioisotopes / Q000032:analysis* / Q000592:standards*; D011874:Radiometry / Q000379:methods* / Q000592:standards*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013051:Spectrometry, Gamma / Q000379:methods / Q000592:standards*
chemical_list: D007457:Iodine Radioisotopes
keywords: (124)I; Gamma-ray spectrometry; Impurities determination