Fig. 2

Measuring points at which microplastics should be measured in an effect study. After production, the measurability is very high, but the ecotoxicologial relevance of the data on size and shape is little. Note that the same criticism applies to particle measurements of microplastics that have been extracted from environmental matrices. During exposure, the state of dispersion might change and, consequently, bioavailability. Unfortunately, no methods are available for particle measurements at this important stage. In vivo and post mortem, microplastics can be characterized at least qualitatevily via light microscopy. Created with biorender.com