Fig. 8

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Comparison of bulk and HCl-treated samples in the pseudo van Krevelen diagram. OI values are decreased while HI values are increased. The effect is more prominent for low TOC samples (see Tab. 4).
Comparison of bulk and HCl-treated samples in the pseudo van Krevelen diagram. OI values are decreased while HI values are increased. The effect is more prominent for low TOC samples (see Tab. 4).
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