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Astm D 4373 [VERIFIED]

| 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). |

Method: ASTM D4373 – 2021 Analyst: [Name] Date: [Current Date] astm d 4373

The method relies on the chemical reaction between carbonates present in the soil and hydrochloric acid (HCl). The reaction produces carbon dioxide (CO₂) gas. | Step | Action | |------|--------| | 1

While useful, the method has distinct limitations that users must consider: | | 3 | Weigh a specimen (typically