E3S Web Conf.
Volume 352, 20227th International Conference on Energy Science and Applied Technology (ESAT 2022)
|Number of page(s)||6|
|Section||Energy Sustainability & Energy-Related Environmental Science|
|Published online||27 June 2022|
Fluorescence labeled capillary electrophoresis fingerprint analysis of sulfonamides residues in tea garden soil and tea
School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, Guizhou, 553004, China
* Corresponding author: Xinwei Bai
A fluorescence labeled capillary electrophoresis fingerprint method for the analysis of sulfonamides residues in tea garden soil and tea was established by using o-phthalaldehyde (OPA) as precolumn derivatization reagent. The effects of background electrolyte concentration, pH, column temperature and voltage on the separation conditions were investigated. The optimum separation conditions were as follows: Glycine sodium hydroxide slow concentration: 20 mmol/L; pH: 9.0; Column temperature: 20 °C; Separation voltage: 17 kv, pressure: 50 mbar, injection time: 8 s. Under the established optimal conditions, 13 sulfonamide derivatives could be separated efficiently within 9 min, and the linear range is 0.35~100μg/kg, the detection limit (signal-to-noise ratio is 3) is in the range of 0.12-0.25 μg/kg, the quantitative limit (signal-to-noise ratio is 10) is in the range of 0.35-0.70μg/kg.
Key words: Derivatization / Phthalaldehyde / Sulfa / Soil / Tea / Capillary electrophoresis
© The Authors, published by EDP Sciences, 2022
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