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. Author manuscript; available in PMC: 2022 Mar 1.
Published in final edited form as: Talanta. 2020 Oct 15;224:121743. doi: 10.1016/j.talanta.2020.121743

Fig. 4.

Fig. 4.

δ13C results (n = 3) for 15 plastic straws of different geographic origins (specified where known). The bar colors indicate the colors of the straws, with grey representing a clear material. See text for details.