On-line Micro Solid-Phase Extraction of Clodinafop Propargyl from Water, Soil and Wheat Samples Using Electrospun Polyamide Nanofibers

Abstract

An on-line extraction/determination set up was designed for micro solid-phase extraction of clodinafop propargyl from water, soil and wheat samples using electrospun polyamide nanofiber mats. The prepared mats were packed in a stainless steel tube which conveniently acted as a high-performance liquid chromatography injection loop. Influential parameters affecting the extraction efficiency were optimized using a distilled water sample fortified with 25 μg L⁻¹ of clodinafop propargyl. An enrichment factor of 440 was achieved for clodinafop propargyl indicating the ability of the whole procedure. Under the optimum conditions, the linearity for the analyte was in the range of 6–700 μg L⁻¹, while a limit of detection and limit of quantification of 2 and 6 μg L⁻¹ were achieved, respectively. The intra-day and inter-day RSD% at the concentration level of 25 μg L⁻¹ were 4.6 and 9.3 %, respectively. To investigate the matrix effect, the developed method was applied to the analysis of real water samples including paddy and river waters as well as the wheat and soil samples. The relative recovery percentages for the spiked samples were in the range of 63–95 %.