ISI Papers With Our Products

Title: A microchip device based liquid-liquid-solid microextraction for the determination of permethrin and cypermethrin in water samples
Journal: Talanta
Author: 1. Mohammad Saraji, 1,2. Samira Dowlatshah, 2. María Ramos-Pay´an
Year: 2021
Address: 1. Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran 2. Department of Analytical Chemistry, Faculty of Chemistry, Universidad de Sevilla, c/Prof. García Gonz´alez, s/n, 41012, Seville, Spain
Abstract: In this work, for the first time, a microchip device integrating liquid-liquid-solid phase microextraction is presented. As a novel approach to microchip systems, liquid-liquid-solid microextraction was performed in a sandwiched microchip device. The microchip device consisted of three poly(methyl methacrylate) layers along with a double “Y”-shaped microchannel. As the stationary phase, polyacrylonitrile-C18 was synthesized and immobilized in the upper channel, while the beneath channel was used as a reservoir for the stagnant volume ratio of sample-to-extraction solvent phase. In this way, analytes were extracted from an aqueous sample through an organic phase into the stationary phase. The analytes were finally desorbed with a minimum amount of acetonitrile as the desorption solvent. Permethrin and cypermethrin were selected as the model analytes for extraction and subsequent analysis by gas chromatography-flame ionization detection. Under optimum conditions (extraction solvent; n-hexane, sample -to-extraction solvent volume ratio; 2:1, extraction time; 20 min, desorption solvent; acetonitrile, desorption volume; 200 μL, and desorption time; 15 min) detection limits were 3.5 and 6.0 ng mL􀀀 1 for permethrin and cypermethrin, respectively. Relative standard deviations for intra- and inter-day reproducibility were below 8.3%. Device-to-device precision was in the range of 8.1–9.6%. The proposed microchip device was successfully applied to determine permethrin and cypermethrin in water samples with recoveries in the range of 73–96%.
Keywords: Microchip device, Liquid-liquid-solid phase microextraction, Gas chromatography-FID, Permethrin and cypermethrin
Application: Extraction
Product Model 1: Syringe Pump
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URL: #https://www.sciencedirect.com/science/article/abs/pii/S0039914021006524#