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The Journal of Supercritical Fluids
Vol. 122, 2017, Pages: 18–26

Supercritical CO2 iof LDPE films with terpene ketones as biopesticides against corn weevil (Sitophilus zeamais)

Li-Qing Peng, Li-Hong Ye, Jun Cao, Yan-xu Chang, Qin Lid, Mingrui An, Zhijing Tan, Jing-Jing Xu

College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China.


A cyclodextrin-based miniaturized solid-phase extraction was developed to extract biopesticides from water and vegetable juices. The analytes were detected by ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry. In the solid-phase extraction (SPE) procedure, the liquid sample solution is passed through a packed column filled with 40 mg of HP-β-CD, and then the target analytes are absorbed and finally eluted with methanol-acetic acid (90:10, v/v) into a collection tube. The limits of quantification ranged from 3.73 to 16.51 ng/mL for a water matrix, from 2.62 to 13.23 ng/mL for an orange juice matrix and from 1.76 to 10.35 ng/mL for a tomato juice matrix, respectively. The average recovery values were in the range of 88.3–95.9% for the spiked samples. The established methodology was successfully applied to analyze sanguinarine, berberine, rotenone and osthole in water, orange juice and tomato juice.

Keywords: Biopesticides; Cyclodextrin; Miniaturized solid-phase extraction; Ultra-high-performance liquid chromatography; Quadrupole time-of-flight mass spectrometry.

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