Indonesian palm civet coffee discrimination using UV-visible spectroscopy and several chemometrics methods

Indonesian palm civet coffee or kopi luwak (Indonesian words for coffee and palm civet) is well known as the world's priciest and rarest coffee. To protect the authenticity of luwak coffee and protect consumer from luwak coffee adulteration, it is very important to develop a simple and inexpens...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-05, Vol.835 (1), p.12010
Main Authors: Yulia, M, Suhandy, D
Format: Article
Language:English
Subjects:
Chemometrics
Coffee
Discrimination
Physics
Spectrum analysis
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Summary:Indonesian palm civet coffee or kopi luwak (Indonesian words for coffee and palm civet) is well known as the world's priciest and rarest coffee. To protect the authenticity of luwak coffee and protect consumer from luwak coffee adulteration, it is very important to develop a simple and inexpensive method to discriminate between civet and non-civet coffee. The discrimination between civet and non-civet coffee in ground roasted (powder) samples is very challenging since it is very difficult to distinguish between the two by using conventional method. In this research, the use of UV-Visible spectra combined with two chemometric methods, SIMCA and PLS-DA, was evaluated to discriminate civet and non-civet ground coffee samples. The spectral data of civet and non-civet coffee were acquired using UV-Vis spectrometer (Genesys™ 10S UV-Vis, Thermo Scientific, USA). The result shows that using both supervised discrimination methods: SIMCA and PLS-DA, all samples were correctly classified into their corresponding classes with 100% rate for accuracy, sensitivity and specificity, respectively.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/835/1/012010