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. Author manuscript; available in PMC: 2020 Feb 11.
Published in final edited form as: Analyst. 2019 Feb 11;144(4):1034–1051. doi: 10.1039/c8an01722k

Fig. 5.

Fig. 5

(A) SPME-nanoESI (Reprinted with permission56. Copyright 2016 American Chemical Society); (B) SPME-OPP (Reprinted with permission58. Copyright 2017 American Chemical Society); (C) SPME-MOI (Reprinted with permission59. Copyright 2018 Future Science).