D4373 – 14 (or current active version: 2021)
| Step | Action | |------|--------| | 1 | Dry the soil sample at 105°C to a constant mass. | | 2 | Crush soil to pass a No. 200 (75 µm) sieve. | | 3 | Weigh a specimen (typically 1–10 g, depending on expected carbonate content). | | 4 | Place specimen into the reaction vessel. | | 5 | Add HCl (without allowing contact until sealed) into a separate chamber or capsule within the vessel. | | 6 | Seal the gas-measuring apparatus. | | 7 | Tip the apparatus to allow acid to contact the soil. | | 8 | Record the maximum gas pressure or volume reading after reaction stabilizes (usually 1–2 minutes). | astm d 4373
Carbonate content (%) is calculated as:
Method: ASTM D4373 – 2021 Analyst: [Name] Date: [Current Date] D4373 – 14 (or current active version: 2021)
1. Title Standard Test Method for Rapid Determination of Carbonate Content of Soils | | 3 | Weigh a specimen (typically