I have recently come across multiple articles in which the authors state that they have used soils from farms free of plastic use history. They further confirm this by conducting polymer identification analyses on the soil samples to ensure they are plastic-free.
This is intriguing, particularly because plastic and microplastic pollution are extremely pervasive.
Do you have any idea how one might use plastic-free soil in their research design?
Are there certain techniques that remove plastic contamination prior to downstream analyses, or are these plastic-free soils collected from isolated farms where external contamination is minimized?
Any insight is appreciated.