Uncovering the Dissipation of Chlorantraniliprole in Tomatoes: Identifying Transformation Products (TPs) and Coformulants in Greenhouse and Laboratory Studies by UHPLC-Q-Orbitrap-MS and GC-Q-Orbitrap-MS

The present study addressed the dissipation of the insecticide chlorantraniliprole in tomatoes treated with Altacor 35 WG under laboratory and greenhouse conditions, as well as the identification of transformation products (TPs) and coformulants, performing suspect screening analysis. Analyses were performed by ultra-high-performance liquid and gas chromatography coupled to quadrupole-Orbitrap high-resolution mass spectrometry (UHPLC-Q-Orbitrap-MS and GC-Q-Orbitrap-MS). In all cases, chlorantraniliprole was fitted to a biphasic kinetic model, with R2 values greater than 0.99. Dissipation was noticeably faster in greenhouse studies, in which even 96% dissipation was achieved over 53 days. One TP, IN-F6L99, was tentatively identified in both greenhouse and laboratory studies and was semiquantified by using chlorantraniliprole as the analytical standard, yielding a top value of 354 mu g/kg for laboratory studies, whereas values for greenhouse studies fell under the limit of quantitation (LOQ). Finally, a total of 15 volatile coformulants were identified by GC-Q-Orbitrap-MS.

Automated summary

The dissipation of chlorantraniliprole insecticide in tomatoes treated with Altacor 35 WG was studied in laboratory and greenhouse conditions, and suspect screening analysis was performed to identify transformation products and coformulants. Analyses using UHPLC-Q-Orbitrap-MS and GC-Q-Orbitrap-MS showed that chlorantraniliprole followed a biphasic kinetic model with R2 values greater than 0.99. Dissipation was faster in greenhouse studies, with 96% achieved over 53 days. One transformation product (IN-F6L99) was tentatively identified in both laboratory and greenhouse studies, and 15 volatile coformulants were identified by GC-Q-Orbitrap-MS.