期刊
FOOD ANALYTICAL METHODS
卷 8, 期 7, 页码 1785-1793出版社
SPRINGER
DOI: 10.1007/s12161-014-0061-y
关键词
L-cysteine functionalized silica gel; Heavy metals; Solid phase extraction; Inductively coupled plasma-mass spectrometry
资金
- Ministry of Science and Technology of China [2012BAK17B03]
- National Natural Science Foundation of China [31171683]
- Special Fund for Agro-scientific Research in the Public Interest of China [201203069]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1166]
A novel l-cysteine functionalized silica gel adsorbent (SG-Cys) was successfully synthesized and characterized by Fourier transform infrared (FTIR) spectra and elemental analysis. An efficient method for simultaneous determination of heavy metals [V (V), Cr (VI), Cu (II), As (V), Cd (II), and Pb (II)] was developed by inductively coupled plasma-mass spectrometry (ICP-MS) coupled with pre-concentration with the prepared SG-Cys adsorbent. The experimental parameters, including the solution pH, sample flow rate, eluent volume, eluent type, and concentration, have been systematically optimized to obtain higher enrichment factors of target ions. Under the optimum conditions, the enrichment factors of V (V), Cr (VI), Cu (II), As (V), Cd (II), and Pb (II) reached 123, 100, 86, 106, 97, and 94, respectively, and the detection limits were as low as 1.8-3.7 ng L-1. The proposed method has been applied to the determination of trace heavy metals in water, rice, wheat, corn, and tea samples, which exhibited a satisfactory recovery in the range of 90.6-106.0 %.
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