vortex-assisted dispersive liquid-liquid microextraction followed by ion mobility spectrometry analysis for determination of spirotetramat

Spirotetramat (spt), as a new pesticide belonging to the cyclic ketoenoles displays a two-way systemicity property and can be easily transported within both the xylem and phloem. this insecticide is extensively used for controlling a broad spectrum of sucking insects such as pistachio psylla. however, the accumulation of spt in environmental and food samples causing damages for human and animals [1-3]. therefore, simple, rapid and sensitive techniques are needed to extract and measure spt from different complex matrix. ion mobility spectrometry (ims) is a simple, cost- effective, rapid and high sensitive technique widely used in monitoring of different compound such as explosives and environmental pollutants. thus, in the present study, a combination of vortex-assisted dispersive liquid-liquid microextraction method and ims technique was used to extract and detection of spt in water and food samples. in order to enhance sensitivity factors affecting the extraction process such as ph, reaction time, volume of extraction solvent were optimized. under the instrumental optimum conditions, the proposed method provided linear dynamic range of 0.5 – 10 µg l-1 and limit of detection of 0.15 µg l-1.