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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Identification of Tobacco Types and Cigarette Brands Using an Electronic Nose Based on Conductive Polymer/Porphyrin Composite Sensors

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Author(s):
Esteves, C. Henrique A. [1, 2] ; Iglesias, Bernardo A. [2, 3] ; Ogawa, Takuji [4] ; Araki, Koiti [2] ; Hoehne, Lucelia [5] ; Gruber, Jonas [2]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Farm, BR-05508000 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
[3] Univ Fed Santa Maria, Dept Quim, Ave Roraima 1000, BR-97105900 Santa Maria, RS - Brazil
[4] Osaka Univ, Dept Chem, Grad Sch Sci, Toyonaka, Osaka 5600043 - Japan
[5] Ctr Univ UNIVATES, Av Avelino Talini 171, BR-95900000 Lajeado, RS - Brazil
Total Affiliations: 5
Document type: Journal article
Source: ACS OMEGA; v. 3, n. 6, p. 6476-6482, JUN 2018.
Web of Science Citations: 6
Abstract

Three tobacco types (Burley, Flue Cured, and Oriental) and eight cigarette brands were unequivocally identified using an electronic nose formed by only three sensors based on a single novel conducting polymer (PF-BTB) doped with different porphyrins (H2TPP, H2TPFP, and H2BTBOP). The synthesis and characterization of the polymer are also discussed. Small changes in the porphyrin structure caused significant changes in the electrical conductance response patterns of the sensors upon exposure to complex chemical matrixes, representing a novel approach for tuning the selectivity of chemiresistive sensors for e-nose application. This e-nose is fast, cheap, reliable, can be easily operated, and could be a valuable tool for border agents fighting cigarette smuggling around the world, helping them prevent losses of millions in tax revenues and sales. (AU)