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. Author manuscript; available in PMC: 2018 Feb 21.
Published in final edited form as: Anal Chem. 2015 Feb 10;87(5):2779–2787. doi: 10.1021/ac504101a

Figure 1.

Figure 1

QCM surface coatings applied by spin-coating on gold-coated quartz crystals. The QCM responses, based on sampling 100 μg Tropine, are plotted on the primary ordinate. The secondary y axis displays the ratio of ΔFc/ΔFp to compare the sensitivity of each coating standardized by the mass loading of the sorbent. All measurements were carried out at isothermal detector temperatures of 100 and 150 °C. A column ramp profile from 120 to 210 °C at 15 °C/min and 25 kPa pressure was used. The first two QCM disc are different types of blank discs from Sycon and Colnatec, followed by various coatings on a Sycon QCM disc. Error bars indicate the standard deviation of at least three measurements.