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Application Note
Application Note
Inorganic carbon in soils and sediments is primarily found as carbonates, such as calcite, magnesite, and dolomite. The total carbonate content is crucial for assessing soil fertility and understanding biogeochemical processes. This analysis aids in calculating carbon fluxes and budgets, and evaluating carbon storage potential.
Materials and Methods
Principles: The calcium carbonate content is determined by reacting a dried sand-calcium carbonate mixture with hydrochloric acid in a sealed vessel, producing CO2 gas. The pressure generated is proportional to the carbonate content. The FOGII Digital Soil CalcimeterTM, patented and compliant with international standards, measures this pressure.
Materials: Required materials include the FOGII Digital Soil CalcimeterTM, safety glasses, plastic cuvettes, hydrochloric acid solution, silica sand, and calcium carbonate reagent.
Sample Preparation and Procedure: Samples are dried, ground, and mixed in specified ratios. The reaction is monitored until pressure variance stabilizes, indicating completion. The method is validated using BIPEA proficiency testing samples.
Results
Tables present recovery rates of CaCO3 in sand mixtures, showing high accuracy and consistency across replicates. The FOGII Digital Soil CalcimeterTM demonstrates reliable performance in measuring total carbonates.
Conclusions
The FOGII Digital Soil CalcimeterTM offers precise, portable, and efficient measurement of soil carbonates, suitable for replacing analog devices. Its portability makes it ideal for fieldwork.
References
References include ASTM standards, patents, and scientific publications related to soil carbonate analysis.
Catalog excerpts
Prototypes Research Development
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the carbonate content of the specimen. The instrument uses a multi-sensor philosophy, which combines simultaneous measurement of pressure and temperature. This technology is innovative and published under the World Intellectual Property Organization number WO2014060782A1. FOGII Digital Soil CalcimeterTM is patented from the Hellenic Industrial Property Organisation (OBI) – Patent No. 1008089. The digital soil calcimeter complies with EN ISO 10693:2013, ASTM D4373-02(2007) and Soil Science Society of America standard test methods for calcium carbonate content in soils and sediments. The total...
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preparing Sand/Soil mixtures (0, 1, 5, 10, 50 and 77.5% CaCO3 by dry weight) from a BIPEA (International Bureau for Analytical Studies) proficiency testing program with soils of different origins. Table 1. CaCO3/Sand mixtures using a standard of pure reagent grade CaCO3 > 99% dry basis. Soil/Sand mixtures Table 2. Soil/Sand mixtures from BIPEA (International Bureau for Analytical Studies) proficiency testing program with soils of different origins. Assigned value for proficiency testing 77.50 ± 3.5 std % CaCOs. Conclusions The instrument uses a multi-sensor philosophy, which combines simultaneous...
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1. ASTM D4373-02. 2007. Standard Test Method for Rapid Determination of Carbonate Content of Soils. 2. Barouchas Pantelis. inventor; Barouchas Pantelis. assignee. 2014a. Automatic portable and digital soil calcimeter. WIPO Patent Priority Number WO2014060782 A1. Apr 24. 2014. 3. Barouchas Pantelis. E. 2014b. FOG II - A new innovative portable instrument for the total calcium carbonate soil testing. 20th World Congress of Soil Science. June 8-13. 2014 - Jeju. KOREA. Friday. 13 June 2014. P4-106. AF2494. 4. EN ISO 10693:2013. Soil quality - Determination of carbonate content -Volumetric method...
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