Abstract
Florpyrauxifen-benzyl is an active ingredient used as herbicide to control weeds in rice cultivation. So far, there are few studies related to the extraction and determining methodologies for this compound. Therefore, this work aimed to optimize and validate solid–liquid extraction with low temperature purification (SLE-LTP) using high-performance liquid chromatography coupled to a diode array detection (HPLC–DAD) to determine the florpyrauxifen-benzyl in rice samples. The results showed that the optimal chromatographic conditions were obtained using the Kinetex column, temperature of 25 °C, mobile phase composition of methanol:water (78:22 v/v), flow rate of 0.3 mL min−1, and 260 nm as the wavelength. The optimum extraction conditions were obtained using acetonitrile and water (2:1) as extraction phase, followed by clean-up of extracts with alumina. The recovery percentage achieved was close to 100%, with relative standard deviation (RSD) less than 9.0%. The result showed a significant matrix effect (184.3%), but the methodology was precise, accurate, linear, and selective, with a quantification limit of 5.0 μg kg−1.
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Acknowledgements
The authors also thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Laboratório de Química Instrumental (LQI-UFMG), and the Universidade Federal de Minas Gerais (UFMG) for the infrastructure provided.
Funding
This study was financed in part by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (306551/2022–5) and the Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) (APQ-02736–21 and APQ-00472–22). The authors are grateful to the Instituto Federal do Norte de Minas Gerais (IFNMG) for financial support in the form of research grants.
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J. C. S. Lopes: sample preparation, HPLC–DAD analysis, investigation, validation, and writing original draft and editing. L. C. Sicupira: provided technical support for the research, prepared figures, review and editing, and final draft supervision. G. P. de Pinho: provided critical insights and suggestions to improve the study, supervision, and helped revise the manuscript. F. O. Silvério: review and editing, supervision, project administration, funding acquisition, and coordinated the study. All authors have read and agreed to the published version of the manuscript.
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Lopes, J.C., Sicupira, L.C., Pinho, G.P. et al. Extraction Method for Determining Florpyrauxifen-Benzyl Herbicide in Rice. Food Anal. Methods 17, 322–331 (2024). https://doi.org/10.1007/s12161-023-02569-3
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DOI: https://doi.org/10.1007/s12161-023-02569-3