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Near-Infrared Spectroscopy Applied to the Detection of Multiple Adulterants in Roasted and Ground Arabica Coffee
| Content Provider | MDPI |
|---|---|
| Author | Couto, Cinthia De Carvalho Freitas-Silva, Otniel Oliveira, Edna Maria Morais Sousa, Clara Casal, Susana |
| Copyright Year | 2021 |
| Description | Roasted coffee has been the target of increasingly complex adulterations. Sensitive, non-destructive, rapid and multicomponent techniques for their detection are sought after. This work proposes the detection of several common adulterants (corn, barley, soybean, rice, coffee husks and robusta coffee) in roasted ground arabica coffee (from different geographic regions), combining near-infrared (NIR) spectroscopy and chemometrics (Principal Component Analysis—PCA). Adulterated samples were composed of one to six adulterants, ranging from 0.25 to 80% (w/w). The results showed that NIR spectroscopy was able to discriminate pure arabica coffee samples from adulterated ones (for all the concentrations tested), including robusta coffees or coffee husks, and independently of being single or multiple adulterations. The identification of the adulterant in the sample was only feasible for single or double adulterations and in concentrations ≥10%. NIR spectroscopy also showed potential for the geographical discrimination of arabica coffees (South and Central America). |
| Starting Page | 61 |
| e-ISSN | 23048158 |
| DOI | 10.3390/foods11010061 |
| Journal | Foods |
| Issue Number | 1 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-12-28 |
| Access Restriction | Open |
| Subject Keyword | Foods Coffee Adulteration Infrared Spectroscopy Authenticity Chemometrics |
| Content Type | Text |
| Resource Type | Article |
