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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Quantitative assessment of specific defects in roasted ground coffee via infrared-photoacoustic spectroscopy
Authors: Dias, Rafael Carlos Eloy
Valderrama, Patrícia
Março, Paulo Henrique
Dos Santos Scholz, Maria Brigida
Edelmann, Michael
Yeretzian, Chahan
DOI: 10.21256/zhaw-4849
Published in: Food Chemistry
Volume(Issue): 255
Page(s): 132
Pages to: 138
Issue Date: 30-Jul-2018
Publisher / Ed. Institution: Elsevier
ISSN: 0308-8146
Language: English
Subjects: Blends of coffee; Chemometric methods; Coffee defects; FTIR-PAS; Species of coffee; Coffee; Food Quality; Photoacoustic Techniques; Spectroscopy; Fourier Transform Infrared
Subject (DDC): 663: Beverage technology
Abstract: Chemical analyses and sensory evaluation are the most applied methods for quality control of roasted and ground coffee (RG). However, faster alternatives would be highly valuable. Here, we applied infrared-photoacoustic spectroscopy (FTIR-PAS) on RG powder. Mixtures of specific defective beans were blended with healthy (defect-free) Coffea arabica and Coffea canephora bases in specific ratios, forming different classes of blends. Principal Component Analysis allowed predicting the amount/fraction and nature of the defects in blends while partial Least Squares Discriminant Analysis revealed similarities between blends (=samples). A successful predictive model was obtained using six classes of blends. The model could classify 100% of the samples into four classes. The specificities were higher than 0.9. Application of FTIR-PAS on RG coffee to characterize and classify blends has shown to be an accurate, easy, quick and "green" alternative to current methods.
Fulltext version: Published version
License (according to publishing contract): CC BY-NC-ND 4.0: Attribution - Non commercial - No derivatives 4.0 International
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Appears in collections:Publikationen Life Sciences und Facility Management

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