A simultaneous voltammetric temperature and humidity sensor

Analyst Pub Date: 2012-09-13 DOI: 10.1039/C2AN35939A

Abstract

We report the simultaneous measurement of temperature and humidity by analysing square wave voltammetric responses of two ferrocene derivatives, decamethylferrocene (DmFc) and 1,2-diferrocenylethylene (bisferrocene, BisFc) in 1-(2-methoxyethyl)-1-methyl-pyrrolidinium tris(pentafluoroethyl)trifluorophosphate ([Moepyrr][FAP]). These two molecules produce three peaks in square wave voltammetry. Through study of the peak potentials of BisFc/BisFc+ (vs. DmFc/DmFc+) and BisFc+/BisFc2+ (vs. DmFc/DmFc+) over a temperature range of 298 K to 318 K and humidity range of 1% to 50% using square wave voltammetry, the temperature and humidity dependences of the relative peak potentials were investigated. A reliable method to calculate the humidity and temperature based on the voltammetric experiment is characterised and demonstrated.

Graphical abstract: A simultaneous voltammetric temperature and humidity sensor
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