Non-target screening of co-formulants in difenoconazole-based plant protection products by LC-Q-Orbitrap
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Author/sMaldonado Reina, Antonio; López Ruiz, Rosalía; Garrido Frenich, Antonia; Romero González, Roberto
Difenoconazole is an approved triazole fungicide used in a broad range of crops. It is applied in the form of plant protection products (PPPs), which are a mixture of the pesticide and several co- formulants that define the properties of the blend. Nonetheless, these co-formulants are not disclosed by the manufacturers, and because of it, they remain unmonitored. The present study focused on the comprehensive analytical determination of polar co-formulants in 15 difenoconazole-based PPPs by ultra-high performance liquid chromatography coupled to Q-Exactive Orbitrap high-resolution mass spectrometry (UHPLC-Q-Orbitrap-MS). Data for non-target analysis were acquired in both Full Scan MS and data-dependent acquisition (ddMS2) modes. Identified compounds mostly included anionic and non-ionic surfactants, predominantly linear alkyl ethoxylates and alkylbenzene sulfonates, although certain emulsifiers, stabilisers, preservatives, and other compounds were also detected. Confirmation and quanti...