The soil samples are all low electromagnetic substances. According to traditional methods, the electromagnetic induction eddy current generated during the combustion process cannot meet the requirements of experimental carbon release. The principle of the infrared absorption method of the high-frequency infrared carbon and sulfur analyzer avoids the sample liquid conversion link in the traditional method, which is a good solution to the shortcomings, which can effectively improve the detection efficiency and reduce the measurement cost. The infrared carbon-sulfur analyzer uses high-frequency induction to heat the soil sample under oxygen-enriched conditions, converts the released carbon into CO2 gas, and detects the carbon in the sample by using an infrared absorption band of 4.26 μm. After measuring the total carbon content, the soil sample was treated with hydrochloric acid, and the content of organic carbon was measured after drying. The difference between the total carbon and the organic carbon was the content of inorganic carbon.
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