Carbonate Testing for Enhanced Rock Weathering
Measure background carbonates and changes in soil inorganic carbon to make weathering results easier to interpret.
Why knowing the carbonate percentage matters
Establish a carbonate baseline
Measure suitable soils and feedstock before application so existing inorganic carbon is recognised when comparing later samples.
Investigate carbonate formation or loss
Repeat measurements can help constrain changes in the solid carbonate fraction. Interpret results alongside sampling variability and the wider geochemical balance.
Support a defined MRV programme
Carbonate testing can complement cation, porewater and alkalinity measurements within a project-specific measurement, reporting and verification plan.
How to interpret your result
Solid carbonate percentage does not measure dissolved bicarbonate and does not independently quantify net CO₂ removal or validate carbon credits. Use the current project protocol.
Agree the sample preparation, reporting units and moisture basis before testing. Ask whether your result will be reported as carbonate expressed as CaCO₃ equivalent, carbonate-derived CO₂ or another agreed quantity.
Scientific references & further reading
The practical benefits above are our synthesis of these sources. Instrument and method suitability is confirmed for your sample.