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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/).
Randomly recorded Raman chemical maps of various ODF samples indicating the distribution and relative occurrence of diclofenac sodium: diclofenac sodium-free N4 reference (a), as well as diclofenac sodium-loaded N8 (b) and N5 (c).