The viscosity of the solution of humic acid,fulvic acid and hvmatomelanic acid extracted from some soils was studied.Results obtained indicaed that they are all nonspherical colloid.The intrinsic viscosity of them in 0.1N NaCl is of following decending order:fulvic acid>humic>hymatomelanic acid.
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陆长青.腐殖物质的某些物理化学性质[J].土壤学报,1965,13(4):442-448. LU CHANG-CHAING. SOME PHYSICO-CHEMICAL PROPERTIES OF SOIL HUMIC SUBSTANCES[J]. Acta Pedologica Sinica,1965,13(4):442-448.