@article{Pérez López_Barrantes Barrantes_Villalobos Landazuri_2020, title={Two methods for the quantification of paraquat in Soluble Concentrate pesticides}, volume={12}, url={https://revistas.uned.ac.cr/index.php/cuadernos/article/view/3042}, DOI={10.22458/urj.v12i2.3042}, abstractNote={<p><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">Introduction:</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399"> In Costa Rica, paraquat is the third most imported pesticide </span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">and</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399"> it is widely applied in different plantations. This makes it necessary to have a strict quality control </span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">for compliance with local regulations</span></span> <span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">Objective:</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399"> To verify and compare AOAC standard methods 969.09 by UV-Vis spectrometry and the respective CIPAC method by HPLC. </span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">Method:</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399"> The guidelines described by the Costa Rican Accreditation Body (ECA) were followed to verify analytical performance parameters in standardized methods. </span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">Results:</span></span> <span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">The UV and HPLC methods proved suitable </span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">but had</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399"> significant differences </span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">in the results</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">.</span></span> <span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">Conclusions:</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399"> Both methodologies comply with the requirements </span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">but we recommend an enlarged test with more</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399"> analyst</span></span><span class="TextRun BCX4 SCXW213842399" lang="EN-US" xml:lang="EN-US" data-contrast="auto"><span class="NormalTextRun BCX4 SCXW213842399">s and laboratories to define which is more accurate.</span></span></p>}, number={2}, journal={UNED Research Journal}, author={Pérez López, Esteban and Barrantes Barrantes, Ericka and Villalobos Landazuri, Roberto}, year={2020}, month={Oct.}, pages={e3042} }