Thermogravimetric Loss Data of Typical Black Soil Profile in Northeast China

After air drying and grinding, the soil sample is sieved through a 100 mesh sieve, and the amount used for determination is approximately 60 mg. The measurement conditions are as follows: use an alumina crucible, with a temperature range of room temperature to 700 ℃, and a heating rate of 5 ℃ · min-1.

To eliminate errors caused by hysteresis effect, heat at a constant temperature for 15 minutes when the temperature is raised to 125 ℃. The protective gas is 20 mL · min-1 argon gas, and the purge gas is 20 mL · min-1 pure air. The thermogravimetric data is output every 10 ℃ of heating, and the difference between adjacent two points is used to differentiate the heating temperature once, resulting in a derivative of thermogravimetry (DTG) curve that reflects the dynamic changes in the rate of mass loss of the sample during the heating process.