A Novel Semi Automated On-Line Determination of Oxonium Ion Via Precipitation Reaction Using a New Mode of Attenuated Measurement of Incident Light (0 – 180o) by AYAH 5SX4-ST-5D Solar CFI Analyser. Iraqi Journal of Science. 2025;55(4hB):1736-1750. doi:10.24996/ijs.2014.55.4B.%g