Or directly from a pre-established calibration curve using pure CaCO₃.
The method relies on the chemical reaction between carbonates present in the soil and hydrochloric acid (HCl). The reaction produces carbon dioxide (CO₂) gas. astm d 4373
Carbonate content (%) is calculated as:
D4373 – 14 (or current active version: 2021) Or directly from a pre-established calibration curve using