期刊
JOURNAL OF SEPARATION SCIENCE
卷 39, 期 6, 页码 1144-1151出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201500896
关键词
Cyanopropyltriethoxysilane; Liquid chromatography; Organophosphorus pesticides; Sol-gel processes; Solid-phase extraction
资金
- Ministry of Higher Education Malaysia through the Research University Grant (RUG) [10J43]
- Fundamental Research Grant [3F452]
- UTM
A new mesoporous silica based on the sol-gel material cyanopropyltriethoxysilane (CNPrTEOS) was successfully synthesized by the hydrolysis and condensation of CNPrTEOS in the presence of ammonium solution as catalyst and methanol as solvent. It was used as a solid-phase extraction sorbent for the simultaneous extraction of three organophosphorus pesticides, namely, polar dicrotophos and non-polar diazinon and chlorpyrifos. Analysis was performed using high-performance liquid chromatography with UV detection. CNPrTEOS was characterized by FTIR spectroscopy, field-emission scanning electron microscopy and nitrogen gas adsorption. The surface area and average pore diameter of the optimum sol-gel CNPrTEOS are 379 m(2)/g and 4.7 nm (mesoporous), respectively. The proposed solid-phase extraction based on CNPrTEOS exhibited good linearity in the range of 0.8-100 g/L, satisfactory precision (1.15-3.82%), high enrichment factor (800) and low limit of detection (0.072-0.091 g/L). The limits of detection obtained using the proposed solid-phase extraction method are well below the maximum residue limit set by European Union and are also lower (13.6-48.5x) than that obtained by using a commercial CN-SPE cartridge (0.98-4.41 g/L). The new mesoporous sol-gel CNPrTEOS showed promising alternative as SPE sorbent material for the simultaneous extraction of polar and non-polar organophosphorus pesticides.
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