title: Liquid-phase extraction coupled with metal-organic frameworks-based dispersive solid phase extraction of herbicides in peanuts.
abstract: Liquid-phase extraction coupled with metal-organic frameworks-based dispersive solid phase extraction was developed and applied to the extraction of pesticides in high fatty matrices. The herbicides were ultrasonically extracted from peanut using ethyl acetate as extraction solvent. The separation of the analytes from a large amount of co-extractive fat was achieved by dispersive solid-phase extraction using MIL-101(Cr) as sorbent. In this step, the analytes were adsorbed on MIL-101(Cr) and the fat remained in bulk. The herbicides were separated and determined by high-performance liquid chromatography. The experimental parameters, including type and volume of extraction solvent, ultrasonication time, volume of hexane and eluting solvent, amount of MIL-101(Cr) and dispersive solid phase extraction time, were optimized. The limits of detection for herbicides range from 0.98 to 1.9 μg/kg. The recoveries of the herbicides are in the range of 89.5-102.7% and relative standard deviations are equal or lower than 7.0%. The proposed method is simple, effective and suitable for treatment of the samples containing high content of fat.
authors: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors: Na
authors: N
authors: Li
authors: College of Chemistry and Life Science, Changchun University of Technology, Yanan Street 2055, Changchun 130012, PR China.
authors: Zhibing
authors: Z
authors: Wang
authors: College of Food, Heilongjiang Bayi Agricultural University, Xinfeng Lu 5, Daqing 163319, PR China.
authors: Liyuan
authors: L
authors: Zhang
authors: Institude of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, PR China.
authors: Li
authors: L
authors: Nian
authors: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors: Lei
authors: L
authors: Lei
authors: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors: Xiao
authors: X
authors: Yang
authors: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors: Hanqi
authors: H
authors: Zhang
authors: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China. Electronic address: analchem@jlu.edu.cn.
authors: Aimin
authors: A
authors: Yu
mesh_terms: D000085:Acetates / Q000737:chemistry; D000327:Adsorption; D010367:Arachis / Q000737:chemistry*; D002853:Chromatography, Liquid; D002857:Chromium / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry; D005223:Fats / Q000737:chemistry / Q000302:isolation & purification; D005504:Food Analysis / Q000379:methods; D005506:Food Contamination / Q000032:analysis; D006540:Herbicides / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D006586:Hexanes / Q000737:chemistry; D059625:Liquid-Liquid Extraction / Q000379:methods*; D013058:Mass Spectrometry; D000073396:Metal-Organic Frameworks; D008670:Metals / Q000737:chemistry; D015203:Reproducibility of Results; D052616:Solid Phase Extraction / Q000379:methods*; D012997:Solvents / Q000737:chemistry
chemical_list: D000085:Acetates; D056831:Coordination Complexes; D005223:Fats; D006540:Herbicides; D006586:Hexanes; C000589635:MIL-101; D000073396:Metal-Organic Frameworks; D008670:Metals; D012997:Solvents; D002857:Chromium; C007650:ethyl acetate
keywords: Ethyl acetate extraction; Herbicide; MOF; Peanuts