Diding Suhandy, Meinilwita Yulia, Slamet Widodo, Hirotaka Naito, Dimas Firmanda Al Riza, Anisur Rahman
High-quality Robusta peaberry coffees in Lampung underwent various processing techniques, including two distinct fermentation methods: Codot-based fermentation (CF) and natural-based fermentation (NF). The variation in fermentation techniques significantly affects the flavor and cost of Lampung's excellent Robusta peaberry coffees. This study examines the potential application of untargeted portable front-face fluorescence spectroscopy and chemometrics to differentiate Lampung fine Robusta peaberry coffees based on various fermentation procedures. Two varieties of green coffee beans were prepared for sampling: CF (n = 60) and NF (n = 60). Three kernels of green coffee beans from CF and NF were placed in a sample holder for each sample. The fluorescence spectral data were obtained using a portable front-face fluorescence spectrometer, including a 365 nm light-emitting diode (LED) as the excitation source. The creation of supervised classification models for CF and NF utilized three distinct classifiers: partial least squares-discriminant analysis (PLS-DA), principal component analysis-linear discriminant analysis (PCA-LDA), and linear discriminant analysis (LDA). The findings indicate that employing preprocessed spectral data yielded a classification accuracy of 100% (p < 0.01) across all classifiers. The current results affirm that assessing Lampung fine Robusta peaberry coffees utilizing various fermentation processes through low-cost front-face fluorescence spectroscopy is feasible. © The Author(s) 2025.
Department of Agricultural Engineering, The University of Lampung, Bandar Lampung, 35145, Indonesia; Spectroscopy Research Group (SRG), Laboratory of Bioprocess and Postharvest Engineering, Department of Agricultural Engineering, The University of Lampung, Bandar Lampung, 35145, Indonesia; Department of Agricultural Technology, Lampung State Polytechnic, Jl. Soekarno Hatta No. 10, Rajabasa, Bandar Lampung, 35141, Indonesia; Department of Mechanical and Biosystem Engineering, IPB University, Bogor, Dramaga, 16002, Indonesia; Graduate School of Bioresources, Department of Environmental Science and Technology, Mie University, 1577 Kurima-Machiya-Cho, Mie, Tsu, 514-8507, Japan; Department of Biosystems Engineering, Faculty of Agricultural Technology, University of Brawijaya, Jl. Veteran, Malang, 65145, Indonesia; Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
