The stability constants of Fe(Ⅱ)-complexes were determined on the basis of the shift in peak potential during the reduction of Fe2+ in the presence of eomplexants. The log K values for soil solutions ranged from 2.6 to 4.5. A chang of pH by 1 unit induced a change of log K by 0.92 unit on average. Aeration of the soil solution led to an increase in logK value. The logKvalues for Fe(Ⅱ)-complexes were larger than those for Mn(Ⅱ)-complexes by about 0.8 unit.
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保学明,于天仁.土壤中水溶性亚铁络合物的稳定常数[J].土壤学报,1986,23(1):40-43. Bao Xueming, Yu Tianren. STABILITY CONSTANTS OF Fe(Ⅱ)-COMPLEXES IN SOILS[J]. Acta Pedologica Sinica,1986,23(1):40-43.