Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3009
Título: Chromatographic techniques for the determination of free phenol in foundry resins
Autor: Oliva-Teles, Maria Teresa
Delerue-Matos, Cristina
Nouws, Henri P. A.
Alvim-Ferraz, Maria da Conceição M.
Palavras-chave: Foundry resin
Gas chromatography
Liquid chromatography
Phenol
Data: 2011
Editora: Taylor & Francis
Relatório da Série N.º: Analytical Letters; Vol. 44, Issue 8
Resumo: Phenol is a toxic compound present in a wide variety of foundry resins. Its quantification is important for the characterization of the resins as well as for the evaluation of free contaminants present in foundry wastes. Two chromatographic methods, liquid chromatography with ultraviolet detection (LC-UV) and gas chromatography with flame ionization detection (GC-FID), for the analysis of free phenol in several foundry resins, after a simple extraction procedure (30 min), were developed. Both chromatographic methods were suitable for the determination of phenol in the studied furanic and phenolic resins, showing good selectivity, accuracy (recovery 99–100%; relative deviations <5%), and precision (coefficients of variation <6%). The used ASTM reference method was only found to be useful in the analysis of phenolic resins, while the LC and GC methods were applicable for all the studied resins. The developed methods reduce the time of analysis from 3.5 hours to about 30 min and can readily be used in routine quality control laboratories.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3009
ISSN: 0003-2719
1532-236X
Versão do Editor: http://www.tandfonline.com/doi/abs/10.1080/00032719.2010.520383#.UpYgCydqyZR
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