STRUCTURAL ELUCIDATION AND ESTIMATION OF THE ACUTE TOXICITY OF THE MAJOR UV-VISIBLE PRODUCT OF FLUDIOXONIL - DETECTION IN GRAPE SAMPLES

摘要

A novel photoproduct of fludioxonil (2-(2,2-difluorobenzo[d][1,3]dioxol-4-yl)-2-(nitrosomethylene)-4-oxobutanenitrile) was identified by LC-HR-MS/Ms coupling after photolysis. UV-visible irradiation of the solution led to an increase in toxicity showing evidence that the photoproduct is more toxic than the fungicide. fludioxonil and its photoproduct were both detected in skin and flesh of grape samples which had been water rinsed after irradiation.