Abstract
Herein, a fabric phase sorptive extraction procedure followed by high-performance liquid chromatography-tandem mass spectrometry was employed as an environmentally friendly and rapid sample preparation method for the simultaneous extraction of imidacloprid and acetamiprid residues in fruit juices. In this work, the covalent organic framework coated on cotton was introduced as the permeable fabric phase sorptive extraction membrane. By the means of approach, the unique characteristics of covalent organic framework sorbent along with the high contact area of the cotton substrate resulted in the formation of an efficient microextraction system that provided high extraction recovery of the desired pesticides from complicated samples. The effective factors on the efficiency of the developed method such as the sorbent amount, flow rate, ionic strength, and the kind and volume of elution solvent were evaluated and optimized through one parameter at a time method. Notably, the current procedure did not require clean-up, centrifugation step, and large number of organic solvents that is complies with green analytical chemistry principles. The coefficient of determination ≥ 0.9928 demonstrates the good linearity of the developed method the range of 17.3–500 ng.mL−1. The extraction recovery was 57 % for imidacloprid and 49 % for acetamiprid. The intra- and inter-day precisions, expressed as relative standard deviations, were ≤ 6.5 % and ≤ 7.1 %, respectively. For both pesticides, the limits of detection and quantification were less than 5.2 and 17 ng.mL−1, respectively.
Published Version
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