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Multifunctionalized magnetic mesoporous silica as an efficient mixed-mode sorbent for extraction of phenoxy carboxylic acid herbicides from water samples followed by liquid chromatography-mass spectrometry in tandem

文献类型： 外文期刊

作者： Zhang, Huixian 1 ; Zheng, Dan 1 ; Zhou, Youxiang 1 ; Xia, Hong 1 ; Peng, Xitian 1 ;

作者机构： 1.Hubei Acad Agr Sci, Inst Agr Qual Stand & Testing Technol Res, Hubei Key Lab Nutr Qual & Safety Agro Prod, Wuhan 430064, Peoples R China

关键词： Magnetic mesoporous silica; Phenoxy carboxylic acids; Magnetic solid phase extraction; Mixed-mode extraction; UHPLC-MS/MS; Water samples

期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.759； 五年影响因子：4.302 ）

ISSN： 0021-9673

年卷期： 2020 年 1634 卷

页码：

收录情况： SCI

摘要： In current study, a rapid and sensitive method for simultaneous determination of 8 phenoxy carboxylic acid (PCA) herbicides in environmental water samples was established based on an octyl and amino functionalized magnetic mesoporous silica (mOAS). The mOAS sorbent was fabricated by simple modification of octyl and aminopropyl groups onto the surface of magnetic mesoporous silica. Various techniques were employed to characterize the physical and chemical properties of the mOAS sorbent. The mOAS sorbent showed good extraction capacity and selectivity for PCA herbicides owing to the mixed-mode hydrophobic and ionic exchange interaction mechanisms. Then a one-factor-at-a-time approach was utilized for the optimization of extraction, washing and eluting conditions. Under the optimum conditions, wide linearity ranges with squared correlation coefficients ranging from 0.9888 to 0.9966 were obtained, and the method detection of limits (LODs) were in the range of 0.005-0.02 ng/mL. Furthermore, recoveries ranged from 86.9 to 114.6% with intra- and inter-day relative standard deviation (RSD) of 0.8-11.0% at three concentration levels spiked in blank water sample. Finally, the as-proposed method was successfully applied to extract 8 PCA herbicides in real water samples followed by determination with ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS). Results showed that the mOAS as adsorbent for magnetic solid phase extraction (MSPE) of acidic herbicides is an efficient alternative with simplicity and rapidity. (C) 2020 Elsevier B.V. All rights reserved.

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