Abstract
Micellar electrokinetic capillary chromatography was used for the determination of picoxystrobin and pyraclostrobin. The background electrolyte consisted of borate buffer (40 mmol L−1 pH 8.5), SDS (30 mmol L−1) and acetonitrile (15% in volume). Runs were made at 25 °C with 25 kV applied potential. The developed method was applied to analyte fortified urine samples. On-line analyte concentration, combined with a capillary of a longer optical path length, allowed limits of quantification of 8.6 × 10−8 mol L−1 for picoxystrobin and 1.8 × 10−7 mol L−1 for pyraclostrobin.
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Acknowledgments
Authors thank FINEP, CNPq and FAPERJ for research grants and scholarships. Statsoft-Brazil is also acknowledged.
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de Souza, C.F., da Cunha, A.L.M.C. & Aucélio, R.Q. Determination of Picoxystrobin and Pyraclostrobin by MEKC with On-Line Analyte Concentration. Chroma 70, 1461–1466 (2009). https://doi.org/10.1365/s10337-009-1318-2
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DOI: https://doi.org/10.1365/s10337-009-1318-2