This method is for determining total oxygen in solid,semi-solid, and high boiling point liquid hydrocarbons atconcentrations ranging from approximately 0.1 to 50 mass-%.Sampling methods are described for several types of samplematrices. The method determines the total oxygen, including organicoxygen compounds, dissolved water and dissolved molecular oxygen.The contributions of oxygen from water and dissolved molecularoxygen can be measured using other methods (see References below)and subtracted from this result. Volatile liquid samples should beanalyzed using UOP Method 730, Total Oxygen in Liquid Hydrocarbonsby Pyrolysis.