Different Approaches for Paraquat Quantification in Waters

Abstract

Three analytical methodologies for paraquat (PQ) identification and quantification in waters were developed and validated in response to different scenarios: a direct injection-liquid chromatography-diode array detector (DI-LC-DAD) method for emergency situations, as occurs when there is a suspicion of contamination of drinking water networks; a solid phase extraction-liquid chromatography-diode array detector (SPE-LC-DAD) method to control the drinking water quality and a direct injection-liquid chromatography-mass spectrometry (DI-LC-MS) method for confirmation purposes and , 38(4), 472-484, 2015 http://dx.doi.org/10.1080/10826076.2014.913526 was assessed when Gramoxone was used as PQ source instead of the analytical standard.1 This article was published in Journal of Liquid Chromatography and Related TechnologiesGlobal uncertainties below 6, 11 and 13% were found for DI-LC-MS, SPE-LC-DAD and DI-LC-DAD, respectively, for the most part of the calibration ranges. All methods proved to be precise, accurate and suitable for the purpose that they were designed.