Magnetic zinc oxide nanoflower-assisted ionic liquid-based nanofluid dispersive liquid–liquid microextraction for the rapid determination of acaricides in tea infusions. Issue 113 (25th November 2016)

• Record Type: Journal Article
• Authors: Yang, Miyi; Zeng, Haozhe; Wu, Xiaoling; Yang, Xiaoling; Zhou, Wenfeng; Zhang, Sanbing; Lu, Runhua; Li, Jing; Gao, Haixiang
• Is Part Of: RSC advances. Volume 6:Issue 113(2016)
• Page Start: 111982
• Page End: 111992
• Publication Date: 2016-11-25
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra22353b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : An ionic liquid based nanofluid with magnetic zinc oxide as a nanoparticle additive was used for the quick determination of acaricides. Abstract : A novel dispersive liquid–liquid microextraction (DLLME) method is proposed for the detection of five acaricides (clofentezine, fenpyroximate, diafenthiuron, pyridaben and spirodiclofen) in tea infusions prior to analysis by high-performance liquid chromatography (HPLC). For this method, a nanofluid prepared by dispersing magnetic zinc oxide nanoflower (FeO4 @ZnO) nanoparticles in 1-octyl-2, 3-dimethylimidazolium bis(trifluoromethanesulfonimide) was used as an extractant. After extraction, the nanofluid was magnetically collected by the addition of FeO4 @ZnO nanoparticles without centrifugation. In DLLME, the joint use of an ionic liquid (IL)-based nanofluid and magnetic retrieval is unprecedented and makes this microextraction process rapid and effective. The main parameters affecting the extraction efficiency were optimized by an orthogonal experiment and a single-factor experiment using tea infusions. Under the optimal conditions, the recoveries of the analytes were between 83.0 and 104.4%, the limits of detection ranged from 0.44 to 1.0 μg L −1, and the intra-day precision and inter-day precision were both lower than 7.5%. The proposed method was successfully applied to the analysis of acaricides in four tea infusions, and the recoveries were between 79.2 and 93.1%, with RSDs of 0.4 to 5.8%. The developed method is promising as an environmentally friendly, convenient, and efficient sample preparation technique.