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Are there feasible strategies for determining bromine and iodine in human hair using interference-free plasma based-techniques?
La Rosa Novo, Diogo; Pereira, Rodrigo Mendes; Henn, Alessandra Schneider; Costa, Vanize Caldeira; Moraes Flores, Erico Marlon; Mesko, Marcia Foster.
Afiliação
  • La Rosa Novo D; Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, Brazil.
  • Pereira RM; Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, Brazil.
  • Henn AS; Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil.
  • Costa VC; Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, Brazil.
  • Moraes Flores EM; Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil.
  • Mesko MF; Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, Brazil. Electronic address: marcia.mesko@pq.cnpq.br.
Anal Chim Acta ; 1060: 45-52, 2019 Jul 04.
Article em En | MEDLINE | ID: mdl-30902330
An effective analytical method for bromine and iodine determination in human hair using interference-free inductively coupled plasma mass spectrometry (ICP-MS) was developed. Human hair was digested based on combustion reaction to obtain compatible solutions with ICP-MS analysis. Using microwave-induced combustion (MIC), masses of human hair ranging from 50 to 300 mg were efficiently digested. Only a diluted alkaline solution (100 mmol L-1 NH4OH) was used for the absorption of both analytes, which was fully compatible with ICP-MS analysis. Using these conditions low limits of detection were obtained (LOD of 0.01 µg g-1 for Br and 0.004 µg g-1 for I). Recovery tests at two levels (50% and 100%) using a standard solution or mixtures of the sample with certified reference materials (CRMs) were carried out to evaluate the suitability of proposed method and recoveries between 94% and 102% were always obtained. Accuracy was evaluated by analysis of a human hair CRM, and the Br and I concentrations obtained by the proposed method did not differ significantly from those described in the certificate. Repeatability (RSDs ≤ 4%) and reproducibility (RSDs ≤ 7%) of the results using proposed method were always very suitable. The digests obtained using the MIC method were fully compatible with ICP-MS and the interferences currently found using conventional digestion methods were completely eliminated. Ultra-trace concentrations of Br and I were determined in human hair, demonstrating that the proposed method is a suitable strategy, and it presents several advantages compared to others published in the literature.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Bromo / Cabelo / Iodo Limite: Humans Idioma: En Revista: Anal Chim Acta Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Bromo / Cabelo / Iodo Limite: Humans Idioma: En Revista: Anal Chim Acta Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda