Research on Octyl-functionalized Ionic Liquid Bonding Silica Gel for Solid Phase Extraction of Shellfish Toxins in Seawater

文献类型： 外文期刊

第一作者： Sun Xiao-Jie

作者： Sun Xiao-Jie;Ding Hai-Yan;Tan Jie;Guo Meng-Meng;Xing Li-Hong;Li Zhao-Xin;Zhai Yu-Xiu;Sun Xiao-Jie;Ding Hai-Yan;Tan Jie;Guo Meng-Meng;Xing Li-Hong;Li Zhao-Xin;Zhai Yu-Xiu;Tan Jie;Xing Jun

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关键词： Ionic liquid; Solid phase extraction; Multiple mode; Shellfish toxins; Seawater

期刊名称：CHINESE JOURNAL OF ANALYTICAL CHEMISTRY （ 影响因子：1.134； 五年影响因子：0.909 ）

ISSN： 0253-3820

年卷期： 2020 年 48 卷 1 期

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收录情况： SCI

摘要： Shellfish toxins are a kind of important marine pollutant. In this study, a novel ionic liquid bonded silica gel material (silica- [SOIM] [PF6]) was prepared by grafting octyl-functionalized ionic liquid onto silica gel, which was characterized and analyzed by infrared spectroscopy (IR), nuclear magnetic resonance (NMR), and elemental analysis. Solid phase extraction cartridge of silica-[SOIM] [PF6], coupled with LC-MS/MS technique was used to extract and determine the concentration of shellfish toxins [Okadaic acid (OA), Dinophysistoxin-1 (DTX-1) and Dinophysistoxin-2 ( DTX-2)] in seawater for the first time. It was found that the solid phase extraction material silica- [SOIM] [PF6] had multiple interactions with the 3 kinds of shellfish toxins, such as hydrophobic and ion-exchange. The method was optimized in aspects of volume and pH of the loaded sample solution, as well as the usage of rinsing and eluting reagents. Results indicated that the silica-[SOIM] [PF6] had good extraction effect on target shellfish toxins in seawater, which was better than or equivalent to the performance of commercial extraction materials. The method had a good linearity (R-2 >0. 995 ) in the concentration range of shellfish toxins from 0.02 mu g/L to 2. 50 mu g/L, with limit of detection (LOD) of 0. 01 mu g/L and limit of quantification ( LOQ) of 0. 05 mu g/L. The average recoveries for 3 kinds of shellfish toxins were 93. 0% -116. 0% at different spiking levels in blank seawater. Simultaneously, the material had good reproducibility, with the relative standard deviation (RSD) of less than 15% intra- and inter-batch. This method was accurate, sensitive, simple and reliable, and could be used for the extraction and detection of shellfish toxins in actual samples.

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