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A solid-liquid microextraction approach from a spot in an adsorbent layer of a chromatographic plateGajos, Rafał; Klimek-Turek, Anna; Dzido, Tadeusz H.
Journal of Chromatography A, 04/2024, Letnik: 1721Journal Article
•Novel device for extracting substances from a chromatographic plate.•Simple, cost-effective, reliable solid-liquid phase extraction method.•The extraction method ensures no cross-contamination between samples occurs.•Sample preparation technique for LC-MS analysis of coccidiostats. A new approach to extracting substances from a spot on a chromatographic plate for subsequent liquid chromatography-mass spectrometry analysis is described. This method involves extraction in a solid phase (an adsorbent layer of a chromatographic plate) - a liquid system using a simple device. For a single extraction of six selected coccidiostats from the adsorbent layer on the chromatographic plate with silica gel, 50 µL of methanol was used for 5 min. The data from the extraction experiments and liquid chromatography-mass spectrometry measurements demonstrated a good correlation between the ratio of the peak areas of the coccidiostats to the internal standard and the concentration of the substances in the range of two orders of magnitude. The coefficients of determination for the mentioned correlations range from 0.962 to 0.999. Moreover, the repeatability and reproducibility, expressed as the percentage values of relative standard deviation, do not exceed 7.5 % for any of the coccidiostats.
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