Synthesis Study Of Surfactants Sodium Ligno Sulphonate (SLS) From Biomass Waste Using Fourier Transform Infra Red (FTIR)Slamet Priyanto, Bambang Pramudono, Tutuk Djoko Kusworo, Suherman, Hapsoro Aruno Aji, Edi Untoro and Puspa RatuMATEC Web Conf., 156 (2018) 03030DOI: https://doi.org/10.1051/matecconf/201815603030