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http://hdl.handle.net/1843/39542| Type: | Artigo de Periódico |
| Title: | Simultaneous detection of multiple adulterants in ground roasted coffee by ATR-FTIR spectroscopy and data fusion |
| Authors: | Nádia Reis Bruno Gonçalves Botelho Adriana Silva Franca Leandro Soares de Oliveira |
| Abstract: | This paper proposes a novel screening method for the simultaneous detection of four adulterants (spent coffee grounds, roasted coffee husks, roasted corn, and roasted barley) in ground roasted coffee using partial least squares discriminant analysis (PLS-DA) with mid-infrared spectroscopy. Two different acquisition modes (attenuated total reflectance, ATR, and diffuse reflectance, DR) are compared. Two recent chemometric approaches, hierarchical models (HM) and data fusion (DF), were employed in order to improve model performance. First level models provided discrimination between unadulterated and adulterated coffee samples, whereas second level models were able to identify the presence of each specific adulterant. The use of DF decreased the percentage of misclassified samples for the first level models from 19.6/14.7% (DR) and 7.5/14.5% (ATR) down to 2.5/4.5% considering the training/test sets. The percentage of misclassified samples in the second level models went as low as 0% (DF—spent coffee, training set). The proposed method is simple, fast, reliable for detecting adulteration in coffee samples, and capable of identifying these adulterants, even when in complex mixtures containing other adulterants. |
| Subject: | Tecnologia de alimentos Café |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ENG - DEPARTAMENTO DE ENGENHARIA MECÂNICA FAR - DEPARTAMENTO DE ALIMENTOS ICX - DEPARTAMENTO DE QUÍMICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | 10.1007/s12161-017-0832-3 |
| URI: | http://hdl.handle.net/1843/39542 |
| Issue Date: | 2017 |
| metadata.dc.url.externa: | https://link.springer.com/content/pdf/10.1007/s12161-017-0832-3.pdf |
| metadata.dc.relation.ispartof: | Food Analytical Methods |
| Appears in Collections: | Artigo de Periódico |
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