Analysis of Glucomannan Molecule in Porang (Ammorphophallus Muelleri Blume) Flour using Nuclear Magnetic Resonance: Ivan Rizoputra, Sriati Wahyudi, Niniek Fajar Puspita, Risdiana Risdiana, Darminto Darminto

Ivan Rizoputra Ivan Rizoputra (Department of Physics, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember)
Sriati Wahyudi Sriati Wahyudi (Department of Biotechnology, Faculty of Graduate School, Universitas Padjadjaran, Bandung)
Niniek Fajar Puspita Niniek Fajar Puspita (Depertment of Industrial Chemical Engineering, Faculty of Vocational Studies, Institut Teknologi Sepuluh Nopember)
Risdiana Risdiana (Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjajaran, Jatinangor)
Darminto Darminto (Department of Physics, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember)

JFA (Jurnal Fisika dan Aplikasinya)
Vol 20 No 3 (2024): October 2024 Edition

The porang tuber (Ammorphophallus Muelleri Blume) is a bulb plant belonging to the Araceae family, which contains the polysaccharide substance of glucomannan. In this work, the porang flour has been purified from tubers by a centrifugation method. To study the content of compounds and types of molecules that make up glucomannan, characterization was carried out using 1H and 13C nuclear magnetic resonance (NMR). The analysis on chemical shift data from both NMR spectra can be concluded that glucomannan in porang is more dominantly constructed by glucose molecules rather than mannose. From these results, it is also known that the toxic compound Ca-oxalate which is part of the porang compound has been reduced during the centrifugation process.