期刊
ANALYTICA CHIMICA ACTA
卷 687, 期 1, 页码 50-55出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2010.12.006
关键词
Liquid-phase microextraction; Microvolume fluorospectrometry; Free and hydrolyzed formaldehyde; Textile analysis
资金
- Spanish Ministry of Science and Innovation [CTQ2009-06956/BQU]
- Vigo University [09VIA08]
- Decanato de estudios de Postgrado de la Universidad Simon Bolivar
A new miniaturized methodology based on the combination of headspace single drop microextraction and microvolume fluorospectrometry is proposed in this work for the determination of free and hydrolyzed formaldehyde in textile samples. The proposed method is based on the extraction and in-drop derivatization of free and hydrolyzed formaldehyde using the Hantzsch reaction. The effect of experimental variables affecting the performance of the proposed method, such as fluorescence parameters, nature of the extractant phase composition (including acetylacetone concentration, pH, ammonium acetate concentration and presence of an organic solvent), sample temperature, NaCl concentration and microextraction time was carefully investigated. Under optimized conditions, instrumental detection and quantification limits were 26 and 87 mu gL(-1), respectively, whereas procedural detection and quantification limits were 1.0 and 3.5 mg kg(-1), respectively. Repeatability, expressed as relative standard deviation, was 4.6% (n=9). The method was successfully applied to the determination of free and hydrolyzed formaldehyde in several textile samples, the found results being in good agreement with those obtained with the EN ISO 14184-1:1998 method. (C) 2010 Elsevier B.V. All rights reserved.
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