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. 2021 Oct 23;26(21):6407. doi: 10.3390/molecules26216407

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Recovery rates (%) and standard deviation of ¹³C-PCDD/Fs (labeled with “*”) by ultrasonic assisted (UAE), Soxhlet (SE), accelerated solvent (ASE), and Microwave assisted (MAE) extractions. Each procedure was performed in triplicate. The dashed red line is the minimum acceptable recovery rate (ISO16000-14).