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Soil-clay extraction-siphon method
Based on Stoxx's law, using the law of settlement of soil particles in still water, the clay particles less than 0.002mm are collected for chemical composition analysis or mineral composition identification. After removing organic matter and carbonates from the air-dried soil sample, use a dispersant to form a suspension, calculate the settling time of the clay particles (particle size less than 0.002mm) according to Stoxx's law, repeatedly suck the clay particles with a siphon, and bake at 105 ℃ Do it right. For the identification of clay minerals, in order not to damage the crystal structure, the drying temperature should be 50 ℃.