Electronic Nose Based on Carbon Nanocomposite Sensors for Clove Essential Oil Detection

Author(s)

Graboski, Adriana M. ^[1] ; Zakrzevski, Claudio A. ^[1] ; Shimizu, Flavio M. ^[2] ; Paschoalin, Rafaella T. ^[2] ; Soares, Andrey C. ^[3] ; Steffens, Juliana ^[1] ; Paroul, Natalia ^[1] ; Steffens, Clarice ^[1]

Affiliation

^[1] URI Erechim, Food Engn, BR-99709910 Erechim, RS - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13566590 Sao Carlos, SP - Brazil

^[3] Embrapa Instrumentat, Nanotechnol Natl Lab Agribusiness LNNA, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: ACS SENSORS; v. 5, n. 6, p. 1814-1821, JUN 26 2020.
• Web of Science Citations: 0

Abstract

This work describes the development of an electronic nose (e-nose) based on carbon nanocomposites to detect clove essential oil (CEO), eugenol (EUG), and eugenyl acetate (EUG.ACET). Our e-nose system comprises an array of six sensing units modified with nanocomposites of poly(aniline), graphene oxide, and multiwalled carbon nanotubes doped with different acids, dodecyl benzene sulfonic acid, camphorsulfonic acid, and hydrochloric acid. The e-nose presented an excellent analytical performance to the detected analytes (CEO, EUG, and EUG.ACET) with high sensitivity and reversibility. The limit of detection was lower than 1.045 ppb, with response time (<13.26 s) and recovery time (<106.29 s) and low hysteresis. Information visualization methods (PCA and IDMAP) demonstrated that the e-nose was efficient to discriminate the different concentrations of analyte volatile oil compounds. PM-IRRAS measurements suggest that the doping mechanism of molecular architectures is composed of a change in the oscillation energy of the characteristic dipoles and changes in the molecular orientation dipoles C=C and C=O at 1615 and 1740 cm(-1), respectively. The experimental results indicate that our e-nose system is promising for a rapid analysis method to monitor the quality of essential oils. (AU)

• FAPESP's process: 18/18953-8 - Nanostructured films applied in microfluidic biosensors to mastitis detection
• Grantee: Andrey Coatrini Soares
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/18725-2 - Hybrid core-shell and Janus nanofibers obtained by solution blow spinning
• Grantee: Rafaella Takehara Paschoalin
• Support Opportunities: Scholarships in Brazil - Post-Doctoral