Automated Photochemically Induced Method for the Quantitation of the Neonicotinoid Thiacloprid in Lettuce.

ABSTRACT: In this work, we present an automated luminescence sensor for the quantitation of the insecticide thiacloprid, one of the main neonicotinoids, in lettuce samples. A simple and automated manifold was constructed, using multicommutated solenoid valves to handle all solutions. The analyte was online irradiated with UV light to produce a highly fluorescent photoproduct (λexc/λem = 305/370 nm/nm) that was then retained on a solid support placed in the flow cell. In this way, the pre-concentration of the photoproduct was achieved in the detection area, increasing the sensitivity of the analytical method. A method-detection limit of 0.24 mg kg-1 was achieved in real samples, fulfilling the Maximum Residue Limit (MRL) of The European Union for thiacloprid in lettuce (1 mg kg-1). A sample throughpu

SUBMITTER: Jimenez-Lopez J 

PROVIDER: S-EPMC6891481 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature