Gas-Liquid Chromatographic Determination of Tetradif on Technical and Formulations: Collaborative Study

Abstract

The gas-liquid chromatographic determination of tetradifon technical and formulations was collaboratively studied in duplicate with 12 laboratories. Six samples were dissolved in dichloroethane with n-hexacosane as the internal standard, chromatographed on a column of 3% SE-52, and detected by flame ionization. The average coefficients of variation were 1.2% for the 2 technical samples, 1.6% for the 2 wettable powders, and 1.5% for the 2 emulsifiable concentrates. The method has been adopted official first action.

Determination of Tetradifon in Brazilian Green Bell Pepper by Differential Pulse Voltammetry

“…This study was first adopted as the official method for analysis of this pesticide, originally published in the Journal Association of Official Analytical Chemists. 4 Several types of samples have been recently analyzed for the presence of the pesticide tetradifon. Among these samples coconut water, 5 medicinal plants, 6 soil, 7 wine, 8 propolis, 9 citrus peel, 10 fruits and vegetables, 11 cereals, 12 tea, 13 wheat flour, 14 honey, 15 spinach, 16 watermelon, 17 water, 18 rice, 19 olive oil, 20 mushrooms, 21 strawberry, 22 avocado, 23 and apple juice, 24 can be mentioned.…”