Abstract：
Microplastics (MPs) have become an important global issue in recent years. However, MPs in the soil have received far less attention than water. Effective and nondestructive extraction of MPs is important for studying MPs in agricultural soils. This study uses different floatation solutions as experiments and uses MgCl2 as the floatation solution of the density extraction method. Five types of standard MPs (PE, PP, PS, PVC, and PET) are used as the objects of this experiment. The recovery of the two particle sizes was between 90.82% and 109.69%. The extracted standard MPs were then subjected to IR and Raman spectroscopic analysis, and the results showed that Raman spectroscopy was more suitable for the identification of the extracted MPs. Finally, this method collected and verified a vast number of soil samples and further analyzed the abundance and characteristics of the collected MPs.
摘要：
近年来，微塑料（MPs）已成为一个重要的全球性问题。然而,与水相比，土壤中的国会议员受到的关注要少得多。有效和无损提取MPs对于研究农业土壤中的MPs具有重要意义。本研究以不同的浮选液为实验，以MgCl2为密度萃取法的浮选液。五种类型的标准MP(PE，PP,PS,PVC,和PET)作为本实验的对象。两种粒度的回收率在90.82%和109.69%之间。然后对提取的标准MPs进行IR和拉曼光谱分析，结果表明，拉曼光谱更适合于提取的MPs的鉴定。最后,该方法收集并验证了大量土壤样品，并进一步分析了所收集的MPs的丰度和特征。
