The Oxygen content of a sample is the contribution that Oxygen makes to the total mass of the sample. Click here for more information on the elemental composition of biomass.

We determine the oxygen content by difference according to the formula below:

Oxygen (%) = 100 - Carbon(% Dry Basis) - Hydrogen(% Dry Basis) - Nitrogen(% Dry Basis) -Sulphur(% Dry Basis) - Ash(% Dry Basis)

We report the oxygen content on a dry-mass basis as well as on an as-received basis and a dry ash-free basis (providing that the ash content and as-received moisture content of the sample have also been determined). We use the calculations outlined in European Standard EN 15296:2011 ("Solid biofuels - Conversion of analytical results from one basis to another") to carry out these conversions. Our figure for the oxygen content of the sample on an as-received basis only considers the oxygen present in the biomass and not that present in the water.

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Analysis Packages for Oxygen

The Celignis Analysis Package(s) that determine this constituent are listed below:

P33   Ultimate (Elemental) Analysis
Carbon, Hydrogen, Nitrogen, Sulphur, Oxygen, Ash Further Details

P34   Calorific Value and Elements
Gross Calorific Value, Net Calorific Value, Ash, Carbon, Hydrogen, Nitrogen, Sulphur, Oxygen Further Details

P40   Combustion Package
Volatile Matter, Fixed Carbon, Moisture, Ash, Carbon, Hydrogen, Nitrogen, Sulphur, Oxygen, Gross Calorific Value, Net Calorific Value, Chlorine Further Details

P50   Ultimate Combustion Package

Volatile Matter, Fixed Carbon, Moisture, Ash, Carbon, Hydrogen, Nitrogen, Sulphur, Oxygen, Gross Calorific Value, Net Calorific Value, Chlorine, Ash Shrinkage Starting Temperature (Reducing), Ash Deformation Temperature (Reducing), Ash Hemisphere Temperature (Reducing), Ash Flow Temperature (Reducing), Aluminium, Calcium, Iron, Magnesium, Phosphorus, Potassium, Silicon, Sodium, Titanium Further Details

P393   Biochar Thermal Properties Deluxe

Moisture, Ash Content (815C), Carbon, Hydrogen, Nitrogen, Sulphur, Oxygen, Chlorine, Volatile Matter, Fixed Carbon, Aluminium, Calcium, Iron, Magnesium, Phosphorus, Potassium, Silicon, Sodium, Titanium, Gross Calorific Value, Net Calorific Value, Ash Shrinkage Starting Temperature (Reducing), Ash Deformation Temperature (Reducing), Ash Hemisphere Temperature (Reducing), Ash Flow Temperature (Reducing) Further Details

P394   Biochar Thermal Properties Ultimate

Thernogram - Under Nitrogen, Thermogram - Under Air, Moisture, Inherent Moisture, Ash Content (815C), Carbon, Hydrogen, Nitrogen, Sulphur, Oxygen, Organic Carbon, Inorganic Carbon, Chlorine, Volatile Matter, Fixed Carbon, Aluminium, Calcium, Iron, Magnesium, Phosphorus, Potassium, Silicon, Sodium, Titanium, Gross Calorific Value, Net Calorific Value, Ash Shrinkage Starting Temperature (Reducing), Ash Deformation Temperature (Reducing), Ash Hemisphere Temperature (Reducing), Ash Flow Temperature (Reducing) Further Details

P399   Biochar Complete Evaluation Package

Thernogram - Under Nitrogen, Thermogram - Under Air, Moisture, Inherent Moisture, Ash Content (815C), Carbon, Hydrogen, Nitrogen, Sulphur, Oxygen, Organic Carbon, Inorganic Carbon, Chlorine, Volatile Matter, Fixed Carbon, Specific Surface Area (Nitrogen Gas Adsorption), Calcium, Iron, Magnesium, Phosphorus, Potassium, Silicon, Sodium, Titanium, Gross Calorific Value, Net Calorific Value, Ash Shrinkage Starting Temperature (Reducing), Ash Deformation Temperature (Reducing), Ash Hemisphere Temperature (Reducing), Ash Flow Temperature (Reducing) Further Details

Additional Material

We can determine the Oxygen content of biomass, click here to learn more about our various biomass analysis methods.