title: Use of ZIF-8-derived nanoporous carbon as the adsorbent for the solid phase extraction of carbamate pesticides prior to high-performance liquid chromatographic analysis.
abstract: In this work, a chemically and thermally robust and highly porous zeolite-type metal-organic framework, zeolitic imidazolate framework-8 (ZIF-8), was used as both a precursor and a template and furfuryl alcohol as a second precursor to synthesize a nanoporous carbon. The prepared ZIF-8-derived nanoporous carbon was used as the solid-phase extraction adsorbent for the extraction of carbamate pesticides from cabbage and water samples. The adsorbed analytes were eluted with acetonitrile for the determination by high performance liquid chromatography-ultraviolet detection. The high surface area, high porosity, good stability and fast adsorption/desorption kinetics of the material enabled it to have a high adsorption capacity and good adsorption performance. Under optimum conditions, good linearity for the analytes in the range of 0.5-100 ng g(-1) and 0.05-20 ng mL(-1) existed for cabbage and water samples with the correlation coefficients of 0.9968-0.9980 and 0.9990-0.9995, respectively. The limits of detection (S/N=3) for the analytes were in the range of 0.25-0.1 ng g(-1) and 0.01-0.02 ng mL(-1) for the cabbage and water samples, respectively. The relative standard deviations (RSDs) for intra-day and the inter-day determinations of the analytes were below 7.0% and 12.5%, respectively.
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Hao
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Xingli
authors.initials: X
authors.lastname: Liu
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Juntao
authors.initials: J
authors.lastname: Wang
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Wang
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Qiuhua
authors.initials: Q
authors.lastname: Wu
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China. Electronic address: zhiwang2013@aliyun.com.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D001937:Brassica / Q000737:chemistry; D002219:Carbamates / Q000032:analysis* / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D060766:Drinking Water / Q000032:analysis; D007093:Imidazoles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry; D016062:Porosity; D052616:Solid Phase Extraction; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
chemical_list: D002219:Carbamates; D060766:Drinking Water; D007093:Imidazoles; D009942:Organometallic Compounds; D010575:Pesticides; D014874:Water Pollutants, Chemical; D017641:Zeolites; D002244:Carbon; D015032:Zinc
keywords: Carbamate pesticides; High performance liquid chromatography; Solid phase extraction; Zeolitic imidazolate framework-8-derived nanoporous carbon