title: A fast and feasible method for Br and I determination in whole egg powder and its fractions by ICP-MS.
abstract: A method for Br and I determination in whole egg powder and its fractions (egg white and yolk) was developed by combining microwave-induced combustion (MIC) and inductively coupled plasma mass spectrometry (ICP-MS). Using the MIC method, 350mg of whole egg powder and its fractions were efficiently digested using 50mmolL-1NH4OH as an absorbing solution. The limits of detection for Br and I using the MIC method followed by ICP-MS determination were 0.039 and 0.015μgg-1, respectively. Using the proposed method, agreements with the reference values between 97 and 104% for Br and I were obtained by analysis of reference material NIST 8435. Finally, it was possible to observe that Br concentration (4.59-5.29μgg-1) was higher than I (0.150-2.28μgg-1) for all the evaluated samples.
authors.affiliation: Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Pelotas, RS, Brazil.
authors.forename: Isis Gonçalves
authors.initials: IG
authors.lastname: Toralles
authors.affiliation: Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Pelotas, RS, Brazil.
authors.forename: Gilberto Silva
authors.initials: GS
authors.lastname: Coelho
authors.affiliation: Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Pelotas, RS, Brazil.
authors.forename: Vanize Cadeira
authors.initials: VC
authors.lastname: Costa
authors.affiliation: Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
authors.forename: Sandra Meinen
authors.initials: SM
authors.lastname: Cruz
authors.affiliation: Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
authors.forename: Erico Marlon Moraes
authors.initials: EMM
authors.lastname: Flores
authors.affiliation: Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Pelotas, RS, Brazil. Electronic address: marcia.mesko@pq.cnpq.br.
authors.forename: Marcia Foster
authors.initials: MF
authors.lastname: Mesko
mesh_terms: D001966:Bromine / Q000032:analysis* / Q000302:isolation & purification; D004531:Eggs / Q000032:analysis*; D007455:Iodine / Q000032:analysis* / Q000302:isolation & purification; D057230:Limit of Detection; D013058:Mass Spectrometry / Q000379:methods*; D011208:Powders / Q000032:analysis
chemical_list: D011208:Powders; D007455:Iodine; D001966:Bromine
keywords: Bromine determination; Egg analysis; ICP-MS; Iodine determination; Microwave-induced combustion; Sample preparation