Fig. 11From: An assessment of methods used for the generation and characterization of cryomilled polystyrene micro- and nanoplastic particlesCorrelation of the number concentration of submicron fragments with a) theoretical cryomilling dose and b) milling time. Triangle markers indicate samples milled at a frequency of 15Â Hz. Circles were samples milled at 30Â Hz. Error bars indicate standard deviation of samplesBack to article page