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Determination of elemental impurities in acyclovir ointment and raw materials using microwave acid digestion (MW-AD) and ICP-MS. Repositório Alice
GONZALEZ, M. H.; SILVA, C. S. da; AMARAL, C. D. B. do; BIANCHI, S. R.; OLIVEIRA, L. H. B. de; COELHO, J. S.; OLIVEIRA, A.; NOGUEIRA, A. R. de A..
Inorganic elements present in pharmaceutical products were determined by inductively coupled plasma-mass spectrometer (ICP-MS), employing microwave acid digestion as a sample preparation method. The most abundant isotopes, 75As+ , 65Cu+ , 52Cr+ , 58Ni+ , 208Pb+ , and 51V+ , were determined in acyclovir ointment and its constituents. Elemental impurities in the pharmaceutical samples were determined using an inductively coupled plasma-universal cell technology-mass spectrometer (ICP-UCT-MS) operated in kinetic energy discrimination (KED) and standard mode. The accuracy of the method was assessed by means of addition and recovery experiments. Except for Cr, spiked recoveries of the elements added to the samples before microwave acid digestion (MW-AD) step...
Tipo: Artigo de periódico Palavras-chave: Pharmaceutical product; Elemental impurity; Acyclovir.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1065497
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Evaluation of distribution and bioaccumulation of arsenic by ICP-MS in tilapia (Oreochromis niloticus) cultivated in different environments. Repositório Alice
OLIVEIRA, L. H. B. de; FERREIRA, N. dos S.; OLIVEIRA, A.; NOGUEIRA, A. R. de A.; GONZALEZ, M. H..
The concentration of arsenic in tissues of tilapia was evaluated and an estimation of the risks associated with the consumption of this fish was done, taking into account the guidelines established by FAO/WHO. The inductively coupled plasma mass spectrometry (ICP-MS) technique in kinetic energy discrimination (KED) mode was employed and certified reference materials were analyzed with recoveries of 101, 110, and 80% from NIST 1640a (trace elements in water), NIST 1566b (oyster tissue), and DORM-3 (fish protein). In the consumable portion (the muscle fish tissue), the average concentration found was 0.030 ± 0.008 µg g-1, which is below the arsenic maximum level established by international regulatory agencies. The average concentration found in the viscera...
Tipo: Artigo de periódico Palavras-chave: Fish tissues; Arsenic; Bioaccumulation.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1079654
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