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. 2021 Feb 9;28(23):29551–29563. doi: 10.1007/s11356-021-12604-7

Fig. 2.

Fig. 2

Correlation between OPVDTT responses of all the investigated PM2.5 samples after different extraction procedures: linear relationships between Gamble (light grey points and line) and MeOH (black points and line) compared with PB extractions. Insets: equations of the best fitting straight lines