Centro de Investigación Aplicada en Ambiente y Salud, CIACYT-Medicina, Universidad Autónoma de San Luis Potosí., Av. Venustiano Carranza 2405, 78210 San Luis Potosí, SLP, Mexico.
Bull Environ Contam Toxicol. 2012 Oct;89(4):744-50. doi: 10.1007/s00128-012-0780-y. Epub 2012 Aug 15.
The aim of this study was to develop a methodology for identifying and quantifying Fipronil and its degradation products in soil by gas chromatography-electron capture detector previously extracted using a focused ultrasound probe. This methodology was obtaining a range of recovery between 85% and 120%, decreasing approximately solvent used time and cost, respect to other methodologies such as bath ultrasonic, solid-phase extraction, liquid-liquid extraction and soxhlet. The method was validated in fortified matrix, presented linearity in the range of 25-400 μg kg(-1), and limit of detection for Fipronil and their products desulfinyl, sulfide and sulfone was 14.7, 9.8, 8.9 and 10.7 μg kg(-1), respectively. This process was applied to samples of agricultural soils, where two degradation products desulfinyl and sulfone were found.
本研究旨在开发一种使用聚焦超声探头预先提取后，通过气相色谱-电子捕获检测器鉴定和定量土壤中氟虫腈及其降解产物的方法。与其他方法（如浴超声、固相萃取、液液萃取和索氏提取）相比，该方法可获得 85%至 120%的回收率范围，减少了溶剂的使用时间和成本。该方法在加标基质中进行了验证，在 25-400μgkg(-1)范围内呈线性，氟虫腈及其降解产物脱磺酰基、硫化物和砜的检测限分别为 14.7、9.8、8.9 和 10.7μgkg(-1)。该方法应用于农业土壤样品中，发现了两种降解产物脱磺酰基和砜。
