TY - JOUR T1 - Low-Cost Near-Infrared Spectroscopy for Rapid Prediction of Biodiesel Properties: Acid Value, Density, Viscosity, and Water Content AU - Thatchapol Chungcharoen,Kittisak Phetpan,Warunee Limmun,Chitwadee Thongphut JO - International Journal of Technology VL - 17 IS - 2 SP - 291 EP - 319 PY - 2026 DA - 2026/03/31 SN - 2087-2100 DO - https://doi.org/10.14716/ijtech.v17i2.8331 UR - https://ijtech.eng.ui.ac.id/article/view/8331