It would be difficult to maintain greater temperature stability than this in these experiments. Furthermore, due to the confines of the Franz cell geometry, it is not practical to measure the temperature of the solution directly. Even if this were possible, few temperature measurement devices have a sensitivity as acute and response time as immediate as the microwave resonant sensor itself. Thus, temperature correction via thermometry is unhelpful. Another possible solution to temperature correction is to use the secondary mode of resonance of the double split-ring resonator as a reference. However, because both resonant sensor modes are in a regime where fluctuations are dominated by the sample itself, any fluctuations due to temperature are inseparable from those due to concentration of measurand solute, making temperature correction using reference modes also unhelpful. Thus, after much effort to reduce the level of fluctuations to a minimum level, it is decided to proceed and to increase the concentration of glucose to a resolvable level at three times that originally planned, and similarly scale the interferent concentrations in accordance.