Degradation study of the trans-cynnamldehyde and limonene biopesticides and their metabolites in cucumber by GC and UHPLC-HRMS: Laboratory and greenhouse studies
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2024-01-16Abstract
Degradation of trans-cinnamaldehyde and limonene in cucumber was evaluated under laboratory and greenhouse
conditions. Two commercial biopesticides, one based on cinnamon extract and other from orange oil, were
utilized. Compound degradation was monitored using gas chromatography (GC) and ultra-high-performance
liquid chromatography (UHPLC) coupled to a quadrupole-high-resolution mass analyzer (Q-Orbitrap). In both
studies, trans-cinnamaldehyde followed a second-order degradation kinetics, whereas limonene followed a first-
order kinetics. The half-life values (DT50 or t1/2) for trans-cinnamaldehyde ranged from 2.02 to 2.49 h, while for
limonene this value ranged from 0.49 to 6.17 h. Non-targeted analysis (suspect and unknown modes) allowed for
the detection of trans-cinnamaldehyde and limonene metabolites. Benzyl alcohol, cinnamyl alcohol, cinnamic
acid, p-tolylacetic acid and 4-hydoxycinnamic acid were tentatively identified as trans-cinnamaldehyde metabolites.
While three l...
Palabra/s clave
Química
Commercial biopesticides
trans-Cinnamaldehyde
Limonene
Degradation metabolites
Cucumber
HRMS