Application of FTIR-ATR Spectroscopy for Quality Mapping and Authenticity Verification of Coffee from Traditional Markets in Padang City, IndonesiaDaimon Syukri, Fitria Indah Permata Sari, Novizar Nazir, Ario Betha Juanssilfero, Rini Rini, Faldiyo Alghifari and Riyana SunardiBIO Web Conf., 189 (2025) 02004DOI: https://doi.org/10.1051/bioconf/202518902004