PJB-2020-308
Persistence studies and effect of processing on downgrading Tebuconazole residues in Chilli and soil using gas chromatography-tandem mass spectrometry
Preeti Dhanker
Abstract
ABSTRACT The issue of food safety and food security are the two key aspects in our country. Also the food we consume is safer or not is the most important topic of concern now-days. Excessive use of agricultural chemicals and fertilizers results in harmful residues including metabolites and degradation products into the environment such as soil, water, plants and food. So in order to estimate the potential risks due to pesticide exposure from food, it is required to evaluate the level of exposure at the time of consumption. The aim of this study conducted during 2016-17, was to assess the level of Tebuconazole (Folicur 25.9EC @ 125 and 250 g a.i ha−1) residues in chilli fruit. Samples were analysed using gas chromatography-tandem mass spectrometry (GC-MS/MS). The residues dissipated with time demonstrating half-life period of 1.61 days at single dose and 2.19 days at double dose following first order kinetics. Processing was found very effective in reducing the residues of tebuconazole in chilli fruits. By washing with tap water, reduction of tebuconazole was in the range of 55.71 to 30.00 percent. While the percent reduction of residues on washing with NaCl solution was in the range of 72.38 to 33.33 percent. Results indicate that washing with NaCl solution as better household practise for reducing the residues in the chilli fruits for consumption purpose. Keywords: Pesticide residues, Tebuconazole, vegetable, food safety, GC-MS/MS.
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