PMID- 29426488 OWN - NLM STAT- MEDLINE DCOM- 20180924 LR - 20180924 IS - 1873-3573 (Electronic) IS - 0039-9140 (Linking) VI - 181 DP - 2018 May 1 TI - Magnetic Cu-MOFs embedded within graphene oxide nanocomposites for enhanced preconcentration of benzenoid-containing insecticides. PG - 112-117 LID - S0039-9140(18)30006-7 [pii] LID - 10.1016/j.talanta.2018.01.004 [doi] AB - Hybrid magnetic nanocomposites based on Cu-MOFs, graphene oxide (GO), and Fe(3)O(4) nanoparticles (NPs) were prepared via chemical bonding approach, which GO were used as platforms to load nanostructured Cu-MOFs and Fe(3)O(4) NPs. The composite features both magnetic separation characteristics and high MOFs porosity, making it an excellent adsorbent for magnetic solid-phase extraction (MSPE). The as-synthesized nanocomposites are characterized by XRD, TGA, SEM, TEM, nitrogen adsorption-desorption analysis and FT-IR spectroscopy. The composites are used in MSPE of six aromatic insecticides from various real samples prior to their quantification by HPLC. Amount of adsorbent, extraction times, extraction temperature, desorption times and oscillation rate are optimized. Under the optimal conditions, the method has a relative standard deviations (RSDs) of 1.9-2.7%, and good linearity (correlation coefficients higher than 0.9931). The low LOD and LOQ for six insecticides are found to be 0.30-1.58mugL(-1) and 1.0-5.2mugL(-1), respectively. The RSDs of within batch extraction are 1.6-9.5% and 3.9-12% for batch to batch extraction. The experimental results suggest that the nanocomposites have potential application for removal of hazardous pollutants from effluents. CI - Copyright (c) 2018 Elsevier B.V. All rights reserved. FAU - Wang, Xuemei AU - Wang X AD - College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Lanzhou 730070, China. Electronic address: wxm98@163.com. FAU - Ma, Xiaomin AU - Ma X AD - College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. FAU - Huang, Pengfei AU - Huang P AD - College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. FAU - Wang, Juan AU - Wang J AD - College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. FAU - Du, Tongtong AU - Du T AD - College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. FAU - Du, Xinzhen AU - Du X AD - College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Lanzhou 730070, China. FAU - Lu, Xiaoquan AU - Lu X AD - College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Lanzhou 730070, China. LA - eng PT - Journal Article DEP - 20180104 PL - Netherlands TA - Talanta JT - Talanta JID - 2984816R RN - 0 (Benzene Derivatives) RN - 0 (Insecticides) RN - 0 (Metal-Organic Frameworks) RN - 0 (Oxides) RN - 7782-42-5 (Graphite) RN - 789U1901C5 (Copper) SB - IM MH - Benzene Derivatives/chemistry MH - Chromatography, High Pressure Liquid MH - Copper/*chemistry MH - Graphite/*chemistry MH - Insecticides/*analysis/chemistry/isolation & purification MH - Magnetics MH - Metal-Organic Frameworks/*chemistry MH - Microscopy, Electron MH - Nanocomposites/*chemistry/ultrastructure MH - Oxides/*chemistry MH - Porosity MH - Reproducibility of Results MH - Spectroscopy, Fourier Transform Infrared MH - X-Ray Diffraction OTO - NOTNLM OT - High performance liquid chromatography OT - Insecticides OT - Magnetic solid-phase extraction OT - Metal-organic frameworks OT - Preconcentration EDAT- 2018/02/11 06:00 MHDA- 2018/09/25 06:00 CRDT- 2018/02/11 06:00 PHST- 2017/11/08 00:00 [received] PHST- 2017/12/27 00:00 [revised] PHST- 2018/01/02 00:00 [accepted] PHST- 2018/02/11 06:00 [entrez] PHST- 2018/02/11 06:00 [pubmed] PHST- 2018/09/25 06:00 [medline] AID - S0039-9140(18)30006-7 [pii] AID - 10.1016/j.talanta.2018.01.004 [doi] PST - ppublish SO - Talanta. 2018 May 1;181:112-117. doi: 10.1016/j.talanta.2018.01.004. Epub 2018 Jan 4.