Solid-Phase Microextraction of Aromatic Amines with an Amide Bridged Calix[4]arene Coated Fiber

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• 作者：Wei Wang ; Shuling Gong ; Qihua Cao ; Yuanyin Chen ; Xiujuan Li and Zhaorui Zeng
• 关键词：Gas chromatography ; Solid phase microextraction ; Calix[4]arene ; coated fiber ; Aromatic amines ; Wastewater samples
• 刊名：Chromatographia
• 出版年：2005
• 出版时间：January 2005
• 年：2005
• 卷：61
• 期：1-2
• 页码：75-80
• 全文大小：303 KB

文摘

Detection of aromatic amines without derivatization was carried out using a new solid-phase microextraction fiber coated with 25,27-dihydroxy-26,28-(1,10-dioxo-4,7-diaza-3,8-dioxooctamethylene)-p-tert-butylcalix[4]arene (amide bridged-C[4]). The new fiber shows excellent selectivity and sensitivity for the tested amines (aniline, o-toluidine, 2,4-dimethylaniline, 3,4-dimethylaniline, N-ethyl-m-toluidine, and N,N-diethylaniline). The coating has high thermal stability (up to 380 °C) and solvent stability. Experimental conditions, such as extraction temperature and time, pH and ionic strength were optimized. The method proposed here shows good linearity and low detection limits ranged from 1.2 to 40 ng.L–1. Application of this method was demonstrated through the determination of aromatic amines in wastewater from a pharmaceutical plant.