Grupo de Análisis de Elementos Traza y Desarrollo de Estrategias Simples para Preparación de Muestras (GATPREM), Analytical Chemistry, DEC, Faculty of Chemistry, Universidad de la República, Gral. Flores 2124, Montevideo, Uruguay.
Centro NanoMat, DETEMA, Faculty of Chemistry, Universidad de la República, Canelones, Uruguay.
Ultrason Sonochem. 2019 Dec;59:104752. doi: 10.1016/j.ultsonch.2019.104752. Epub 2019 Aug 23.
Ultrasonication is known to induce cavitation and can thus accelerate extraction, dissolution, digestion, and other processes, while the intense mixing caused by the propagation of ultrasound waves enhances analyte transfer to the extraction medium. Consequently, ultrasound-assisted extraction (UAE) is viewed as a simple procedure well suited for the extraction and subsequent determination of trace elements in food. Herein, we use different techniques to characterize several processes involved in probe- and bath-based UAE, apply them to the determination of trace metals (Cd, Cu, Ni, Pb, and Zn) in globe artichoke leaves and soybean seeds, and closely monitor the extraction rates of selected analytes. The developed UAE-based method is found to comply with the criteria of Green Chemistry and is concluded to be a reliable, simple, and cheap alternative to standard food analysis techniques.
超声处理已知能引发空化作用，从而加速提取、溶解、消化和其他过程，而超声波传播引起的强烈混合增强了分析物向提取介质的转移。因此，超声辅助提取（UAE）被视为一种简单的方法，非常适合于食品中痕量元素的提取和随后的测定。在这里，我们使用不同的技术来描述探针和浴式 UAE 中涉及的几个过程，将它们应用于球蓟叶和大豆种子中痕量金属（Cd、Cu、Ni、Pb 和 Zn）的测定，并密切监测选定分析物的提取率。所开发的基于 UAE 的方法符合绿色化学的标准，被认为是标准食品分析技术的可靠、简单和廉价的替代方法。
