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Reference type: Journal
Authors: Zhao FN, Wang SS, She YX, Zhang C, Zheng LF, Jin MJ, Shao H, Jin F, Du XW, Wang J
Article Title: Subcritical water extraction combined with molecular imprinting technology for sample preparation in the detection of triazine herbicides.
Publication date: 2017
Journal: Journal of Chromatography A
Volume: 1515
Page numbers: 17-22.
DOI: 10.1016/j.chroma.2017.06.011
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0021967317308440

Abstract: A selective, environmentally friendly, and cost-effective sample extraction method based on a combination of subcritical water extraction (SWE) and molecularly imprinted solid-phase extraction (MISPE) was developed for the determination of eight triazine herbicides in soil samples by liquid chromatography-tandem mass spectrometry (LC-MS/MS). In SWE, the highest extraction yields of triazine herbicides were obtained under 150 C for 15min using 20% ethanol as the organic modifier. Addition of MIP during SWE increased the extraction efficiency, and using MIP as a selective SPE sorbent improved the enrichment capability. Soil samples were treated with the optimized extraction MIP/SWE-MISPE method and analyzed by LC-MS/MS. The novel technique was then applied to soil samples for the determination of triazine herbicides, and better recoveries (78.9%-101%) were obtained compared with using SWE-MISPE (30%-67%). Moreover, this newly developed method displayed good linearity (R2 > 0.99) and precision (2.7-9.8%), and low enough detection limits (0.4-3.3 μg kg-1). This combination of SWE and MIP technology is a simple, effective and promising method to selectively extract class-specific compounds in complex samples
Template and target information: triazine herbicides
Author keywords: subcritical water extraction, molecularly imprinted solid-phase extraction, triazine herbicides, LC-MS, MS

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