期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1192, 期 1, 页码 89-94出版社
ELSEVIER
DOI: 10.1016/j.chroma.2008.03.037
关键词
dynamic ultrasound-assisted extraction; solid support derivatization; on-line detection; formaldehyde; textile
An on-line method was developed for the extraction, derivatization and determination of formaldehyde in textile samples. Formaldehyde was first extracted with water by ultrasound assisted, and directly introduced into a derivatization column which was packed with a moderately sulfonated cation-exchange resin. The resin used as solid support for the derivatization was charged with 2,4-dinitrophenylhydrazine (DNPH) previously. The formaldehyde DNPH derivative was eluted with the chromatographic mobile phase into an analytical column for the separation, and then monitored by UV detector. The maximum extraction yield was achieved when the extraction vessel was located at 10 mm from the ultrasonic source and 10 mg textile sample was extracted with 5 mL pure water at a flow rate of 1.0 mL min(-1) at 50 degrees C. The detection limit of the proposed method was 0.06 mg kg(-1). This method was applied to the determination of formaldehyde in different textile samples, and compared with the state standard method (off-line spectrophotometry) used in China. The similar contents of formaldehyde were obtained for most samples by the two methods, but little higher for some samples obtained by the proposed method. The average relative standard deviation (RSD) obtained by the on-line method was 3.2% which is lower than 29.5% obtained by the standard method. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据