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A weight presses down on a rod, providing a normal force on the plastic sample attached to the bottom of a plate. The power input to the abrasion process can be characterized in a scalable fashion through knowledge of this normal force and the torque measured on the rotating abrading element. The sample is pressed onto the abradant, in this case a glass file, which rotates and is enclosed in the space which allows for abraded nano- and microplastics to be collected for further analysis. After cleaning out the inside of the machine and placing the machine under a hosed fume hood, collectors were placed to recover the abraded nano- and microplastics. To avoid external contamination, the lab users wore cotton lab coats and clothing, regularly cleaned the chamber with cleanroom wipes and ethanol after each sample and stored each sample in a glass container.

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