Chemometric analysis of CD-IMS Signals for Discrimination of gas mixtures

BOGGIO, NORBERTO G; VOROBIOFF, JUAN; LAMAGNA, ALBERTO; RINALDI, CARLOS

Ramada Plaza JeJu, Jeju Island, Korea

Congreso; The 16th International Meeting on Chemical Sensors; 2016

The 16th International Meeting on Chemical Sensors

p { margin-bottom: 0.21cm; direction: ltr; color: rgb(0, 0, 0); }p.western { font-family: "Arial",sans-serif; font-size: 11pt; }p.cjk { font-family: "Times New Roman",serif; font-size: 11pt; }p.ctl { font-family: "Arial",sans-serif; font-size: 12pt; }a:link { color: rgb(0, 0, 255); }Inthis work the results for the detection and discrimination of ethanoland acetone at low concentration levels are presented, with anaspiration type ion mobility spectrometry (IMS) system developed inour laboratory. A continuous electrical corona discharge was used asionization system with a Bradbury-Nielsen gate incorporated tocontrol the entry of ions. Signals of voltage vs. time were obtainedby the arrival of ions on two detectors and give a characteristicpattern depending on the ionic mobility of the formed species. Usingthe software ?Chemoface? for multivariate analysis, the FastFourier Transform (FFT) of signals were processed. PrincipalComponent Analysis (PCA) applying different pre-processing methodswas done. PCA variables were established as the intensities of theFFT peaks. According with the results, samples were discriminated ina similar way, depending on the pre-processing method applied.