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Discrepancies in the results obtained during the adsorption of nitrogen, argon, and water on two mesoporous samples are compared and contrasted. A silica-based mesoporous oxide and the same sample coated with a film of polystyrene were chosen with respect to their different surface chemistries. The nitrogen BET surface is overestimated on the pure silica sample and underestimated for the polymer-coated...
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