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. 2019 Jan:294:15-20.
doi: 10.1016/j.forsciint.2018.10.016. Epub 2018 Oct 28.

Chemometric approach for discriminating tobacco trademarks by near infrared spectroscopy

Jone Omar  1 , Boleslaw Slowikowski  1 , Ana Boix  2
Affiliations

Chemometric approach for discriminating tobacco trademarks by near infrared spectroscopy

Jone Omar et al. Forensic Sci Int. 2019 Jan.

Abstract

Cigarettes are consumer products with a broad market-driven orientation. In order to satisfy the different needs of smokers, cigarette trademarks with different aroma, taste and appearance are available on the market. In this study near infrared (NIR) spectroscopy in combination with chemometrics was applied in order to distinguish cigarette trademarks by analysing the tobacco. Calibration models were developed to differentiate three tobacco trademarks and their respective producers. The developed models also allowed the discrimination of the tobacco according to their geographical origin and may serve as a tool for the detection of counterfeit tobacco.

Keywords: Chemometrics; Near infrared spectroscopy; Tobacco.

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Figures

Fig. 1
Fig. 1
Representative NIR spectra of tobacco pellets in the region of 7600–3900 cm−1 from trademarks Camel (JTI), Lucky Strike (BAT) and Marlboro Red (PMI).
Fig. 2
Fig. 2
Score plot of PC2 versus PC3 of NIR spectra from three tobacco trademarks: Camel produced by JTI, Lucky Strike produced by BAT and Marlboro Red produced by PMI.
Fig. 3
Fig. 3
Sample grouping of PLS-DA, (a) tobacco companies BAT and PMI; (b) tobacco companies JT and PMI. The response variables were set to 1 and 2 respectively.
Fig. 4
Fig. 4
Score plot of PC1 versus PC2 of NIR spectra of Marlboro (PMI) tobacco (up), with cigarettes from Europe (red triangles), United States of America (green diamonds) and China (blue dots). Sample grouping of PLS-DA with Marlboro tobaccos from different origins, (a) China vs Europe (bottom-left); (b) Europe vs USA (bottom-right). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
Fig. 5
Fig. 5
Score plot of PC2 versus PC3 of NIR spectra of European tobacco (red triangles) and Chinese tobacco (blue dots). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
Fig. 6
Fig. 6
Score plot of PC1 versus PC2 of NIR spectra of European tobacco (red dots) and the counterfeited sample (blue square). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
See this image and copyright information in PMC

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