Výsledky vyhledávání - "Froes, Roberta"

Comparison between ultrasound assisted extraction and microwave digestion in the determination of arsenic in edible grains

Autor: Ribeiro, Roberto Vieira, Vieira, Júlia C., Lobo, Fabiana Aparecida, Froes, Roberta Eliane Santos

Publikováno v: Repositório Institucional da UFOP
Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP

A comparative evaluation of arsenic extraction from grains using ultrasound assisted extraction (UAE) and microwave digestion (MW) was developed. The arsenic determination was carried out using hydride generation coupled to flame atomic absorption sp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::0efd56c2517c6663ac5af9e191b577ac
http://www.repositorio.ufop.br/handle/123456789/9955

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Evaluation of signal-to-background and Mg II/Mg I ratios as response for the optimization of rare earth elements determination by inductively coupled plasma optical emission spectrometry

Autor: Guimarães-Silva, Aline K., Lena, Jorge C. de, Froes, Roberta E. S., Costa, Letícia M., Nascentes, Clésia C.

Publikováno v: Journal of the Brazilian Chemical Society v.23 n.4 2012
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 23, Issue: 4, Pages: 753-762, Published: APR 2012

Rare earth elements (REEs) is a peculiar group of chemical elements. Their determination in geological samples is important and complex due to their low concentrations and problems with spectral and non-spectral interferences. Herein, the operating c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::8fbee3828602f1d9f9d77d1bd3a43caf
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000400022

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