On-line Preconcentration and Determination of Trace Metals in Water Samples by Flow Injection Combined with Flame Atomic Absorption Spectrometry via Calix[4]arene Carboxylic Acid Packed Micro-column

作     者：GUO Da-wang, ZHAO Xiao-wei, JIA Qiong and ZHOU Wei-hong College of Chemistry, Jilin University, Changchun 130012, P. R. China 

作者机构：College of Chemistry Jilin University Changchun 130012 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2012年第28卷第1期

页      面：26-30页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：Supported by the Fund of State Key Laboratory of Rare Earth Resource Utilization  Changchun Institute of Applied Chemi-stry  Chinese Academy of Sciences(No.RERU2011006) 

主　　题：Calixarene carboxylic acid Preconcentration Flow injection Metal ion Flame atomic absorptionspectrometry(FAAS) 

摘      要：An adsorbent calix[4]arene carboxylic acid was employed as the adsorption material for on-line flow in jection（FI） micro-column preconcentration coupled with flame atomic absorption spectrometry（FAAS） determination of trace heavy metals（Cu, Pb, Co, Ni and Cd）. Parameters such as the pH, loading time and flow rate of sample, and the concentration, volume and flow rate of eluent were optimized. The enrichment factors are 50.0, 56.5, 11.6, 12.1 and 19.1 for Cu, Pb, Co, Ni, and Cd, respectively, and a sample throughput of 20 h–1 was obtained. The limits of de tection for Cu, Pb, Co, Ni, and Cd were in a range of 1.56―3.91 μg/L, and the relative standard deviations（RSDs） were less than 2.76%（n=7）. Furthermore, the proposed method was successfully applied to the determination of Cu, Pb, Co, Ni, and Cd in certified reference materials and various water samples.