CHROMATOGRAPHIC TECHNIQUES FOR THE DETERMINATION OF FREE PHENOL IN FOUNDRY RESINS

被引:4
作者
Oliva-Teles, Maria Teresa [1 ]
Delerue-Matos, Cristina [1 ]
Nouws, Henri P. A. [1 ]
Alvim-Ferraz, M. C. M. [2 ]
机构
[1] Inst Super Engn Porto, REQUIMTE, Oporto, Portugal
[2] Univ Porto, Fac Engn, LEPAE, P-4100 Oporto, Portugal
关键词
Foundry resin; Gas chromatography; Liquid chromatography; Phenol; MASS SPECTROMETRY; AQUEOUS SAMPLES; WATER; MICROEXTRACTION; CHLOROPHENOLS; DERIVATIVES;
D O I
10.1080/00032719.2010.520383
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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.
引用
收藏
页码:1536 / 1543
页数:8
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