A new method for complete analysis of soil colloid was proposed.The SiO2, content was determined by the loss of weight of HF-HN03 evaporation and ignition at 870-9000C for 30-40 minutes.
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王振权,张国珠,冯秀美.土壤胶体半微量全量速测法——(氟氢酸—硝酸消化法)[J].土壤学报,1958,6(3):205-208. C. C. WANG, K. C. CHANG, S. M. VONG. A RAPID SEMIMICRO METHOD FOR COMPLETE ANALYSIS OF SOIL COLLOID(HF-HNO3 METHOD)[J]. Acta Pedologica Sinica,1958,6(3):205-208.