| Autor: |
Lima GDS; Chemistry Institute, Federal University of Goiás, Goiánia, Goiás 74690-900, Brazil., Pereira I; Chemistry Institute, Federal University of Goiás, Goiánia, Goiás 74690-900, Brazil.; Department of Chemistry, Vancouver Island University, Nanaimo, British Columbia V9R 5S5, Canada., Maciel LIL; Chemistry Institute, Federal University of Goiás, Goiánia, Goiás 74690-900, Brazil., Lima NM; Chemistry Institute, Federal University of Goiás, Goiánia, Goiás 74690-900, Brazil., Araujo GL; Chemistry Institute, Federal University of Goiás, Goiánia, Goiás 74690-900, Brazil., de Aguiar DVA; Chemistry Institute, Federal University of Goiás, Goiánia, Goiás 74690-900, Brazil., Dos Santos GF; Chemistry Institute, Federal University of Goiás, Goiánia, Goiás 74690-900, Brazil., Vaz BG; Chemistry Institute, Federal University of Goiás, Goiánia, Goiás 74690-900, Brazil. |
| Abstrakt: |
There is an increasing need for developing a strategy to analyze the penetration of pesticides in cultures during postharvest control with minimal or no sample preparation. This study explores the combined use of laser ablation electrospray ionization mass spectrometry imaging (LAESI imaging) and tissue spray ionization mass spectrometry (TSI-MS) to investigate the penetration of thiabendazole (TBZ) in fruits, simulating a postharvest procedure. Slices of guava and apple were prepared, and an infrared laser beam was used, resulting in the ablation of TBZ directly ionized by electrospray and analyzed by mass spectrometry. The experiments were conducted for 5 days of fruit storage after TBZ administration to simulate a postharvest treatment. During postharvest treatment, TBZ is applied directly to the fruit peel after harvesting. Consequently, TBZ residues may remain on the peel if the consumer does not wash the fruit properly before its consumption. To evaluate the effectiveness of household washing procedures, TSI-MS was employed as a rapid and straightforward technique to monitor the remaining amount of TBZ in guava and apple peels following fruit washing. This study highlights the advantages of LAESI imaging for evaluating TBZ penetration in fruits. Moreover, the powerful capabilities of TSI-MS are demonstrated in monitoring and estimating TBZ residues after pesticide application, enabling the comprehensive unveiling of pesticide contaminants in fruits. |
