Highlights • A new method for microplastic extraction from lake sediments is proposed.• Potassium formate was applied for density separation.• Repeated wet peroxide oxidation was applied to digest organic matter.•… Click to show full abstract
Highlights • A new method for microplastic extraction from lake sediments is proposed.• Potassium formate was applied for density separation.• Repeated wet peroxide oxidation was applied to digest organic matter.• Quality control procedures are proposed.• The effectiveness of the microplastic extraction with potassium formate is 98.0 ± 2%.
               
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