A humid electronic nose based on pulse voltammetry: A proof-of-concept design

摘要: Abstract We report herein the design, manufacture and use of a “humid electronic nose” prototype based on voltammetric techniques. It consists an array four working electrodes (i.e., Au, Pt, Ir Rh) housed inside homemade stainless steel cylinder, in contact with fabric mesh made nylon damped NaCl aqueous solution, used as supporting humid membrane. The was tested for discrimination different samples displaying volatile compounds. chosen involve solutions simple products ammonia, acetone, acetic acid 6-amino-1-hexanol) food onion, coffee Roquefort cheese). Under conditions, compounds from corresponding sample were generated measurement chamber partially dissolved fabric, which set electrodes. envisioned that provided offer vapours, application suitable pulses to will differentiate samples. This proof-of-concept study employed Large Amplitude Pulse Voltammetry (LAPV) waveform. increment potential steps 200 mV potentials ranged +1 −1 V each pulse applied 50 ms. PCA studies response obtained by discriminated studied. neural network Self Organized Map (SOM) also analyze electrochemical data nose”.