Today, the most common among fungicides approved for use in Ukraine, as well as in other countries, are compounds of the triazole class. Juices, as a product of processing agricultural raw materials, can be consumed by a wide range of the population. The purpose of work was to develop analytical methods for compound of triazole (difenoconazole and propiconazole) in juices to ensure quality control of agricultural products grown with the use of these fungicides. Conditions for chromatography of difenoconazole and propiconazole using gas-liquid chromatography with capillary column SH-Rxi-5ms (30 m 0,25 mm) and electron capture detector were determined. Optimal conditions of difenoconazole chromatography were established: thermostat column temperature - 280 C, evaporator temperature - 290 C, detector thermostat temperature - 300 C. Retention time: isomer 1 - (6,91 +- 0,1) minutes, isomer 2 - (7,04 +- 0,1) minutes. The linear range of detection is 0,01-0,04 ug/cm3. The optimal conditions for chromatography of propiconazole were also established: the temperature of the column thermostat in the programming mode: initial T - 100 C with an exposure of 1 minute; from 90 C to 260 C - rate of temperature rise 40 C/min; exposure - 7,45 minutes; evaporator temperature - 270 C, detector temperature - 280 C. The retention time under these conditions was 3,49 +- 0,1 minutes for isomer 1 and 3,57 +- 0,1 minutes for isomer 2. The linear range of detection is 0,01-0,05 ug/cm3. The calibration dependence of the area of peaks of the investigated substances on their concentration was established and described by the linear regression equation.
Определены условия хроматографического разделения производных фенилуксусной кислоты и триазола на примере крезоксим-метила и пропиконазола с использованием метода газожидкостной хроматографии с капиллярной колонкой НР-5 и электроннозахватным детектором. Разработанная методика была использована для определения микроколичеств крезоксим-метила и пропиконазола в воде. Ключевые слова: газожидкостная хроматография (ГЖХ), фунгициды, производные фенилуксусной кислоты, триазолы. Визначено умови хроматографічного розділення похідних фенілоцтової кислоти та триазолу на прикладі крезоксим-метилу та пропіконазолу з використанням методу газорідинної хроматографії з капілярною колонкою НР-5 та електроннозахватним детектором. Розроблена методика була використана для визначення мікрокількостей крезоксим-метилу та пропіконазолу у воді. Ключові слова: газорідинна хроматографія (ГРХ), фунгіциди, похідні фенілоцтової кислоти, триазоли. Studied conditions for chromatographic separation of phenylacetic acid and triazole derivatives by the example of kresoxim-methyl and difenoconazole, using gas-liquid chromatography with capillary column HP-5 and electron capture detector. Developed method was used for determination kresoxim-methyl and difenoconazole residues in water.
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