The development of new materials has significantly impacted the area of analytical sample preparation. In the last few years, a variety of new materials such as ionic liquids, carbon-based materials, metal and carbon-organic frameworks, and magnetic materials, have been utilized in the separation of analytes from different matrices. Among these, magnetic materials have attracted considerable attention because of their unique magnetic character that facilitates their easy retrieval during the extraction process. Besides, magnetic materials can be functionalized/modified with a variety of other materials to have desired functional moieties for selective extractions and to magnetize other materials for their easy separation. In this review, the existing and emerging magnetic extraction media have been classified based on the functional moieties that play a substantial role in the extraction of metals. This review also offers a critical discussion of the modern trends which are being practiced in magnetic analytical extractions.

新材料的发展极大地影响了分析样品制备的领域。在最近几年中，已经使用了多种新材料，例如离子液体，碳基材料，金属和碳有机骨架以及磁性材料，来分离来自不同基质的分析物。其中，磁性材料因其独特的磁性特性而吸引了相当多的关注，这些磁性特性有助于它们在提取过程中易于回收。此外，磁性材料可以用多种其他材料进行功能化/修饰，以具有用于选择性提取的所需功能部分，并磁化其他材料以使其易于分离。在这篇评论中 现有的和新兴的磁性提取介质已根据在金属提取中起重要作用的功能部分进行了分类。这篇评论还对磁分析提取中正在实践的现代趋势进行了批判性讨论。