Microplastics, small plastic particles ranging in size from 1 to 5000 microns, are present in diverse environmental matrices and pose significant threats to human health and ecosystems. The Environmental Contaminants Analytical Laboratory (ECAL) and the Materials Characterization Laboratory (MCL) will review physical and chemical characterization techniques for microplastics in a wide range of environmental and biological matrices. In this talk, we will also discuss ECAL's quality assurance and control, standardized procedures for sample preparation, detection and identification, as well as small-scale, research-focused characterization techniques at the MCL. This information will help researchers make informed decisions on the most suitable analytical approach for their research projects.