Automated in-syringe single-drop head-space micro-extraction applied to the determination of ethanol in wine samples |
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Authors: | Ivana &Scaron rá mková ,Burkhard HorstkottePetr Solich,Hana Sklená řová |
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Affiliation: | Department of Analytical Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic |
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Abstract: | A novel approach of head-space single-drop micro-extraction applied to the determination of ethanol in wine is presented. For the first time, the syringe of an automated syringe pump was used as an extraction chamber of adaptable size for a volatile analyte. This approach enabled to apply negative pressure during the enrichment step, which favored the evaporation of the analyte. Placing a slowly spinning magnetic stirring bar inside the syringe, effective syringe cleaning as well as mixing of the sample with buffer solution to suppress the interference of acetic acid was achieved. |
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Keywords: | DC, direct current FT, flow techniques GD, gas diffusion HC, holding coil LLE, liquid-liquid extraction MBL-GD, membrane-less gas diffusion P, pervaporation R, reagent SDME, single-drop micro-extraction SIA, sequential injection analysis SV, selection valve ETFE, ethylene tetrafluoroethylene |
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