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Chemoselective detection of acyclic and cyclic ketone gases (76 ppb each) on display by a 9 MHz QCM thin-coated with AIL3 (3.3 nL, 300 nm thickness) with 2 mol% Sc(OTf)3. Ketone gas samples were injected at 300 s. Frequency drops for 3-pentanone, 2-butanone, acetone, cyclopentanone, cyclohexanone and cycloheptanone were 13, 49, 97, 75, 159 and 69 Hz, respectively.
