The Effect of Extraction Conditions on Iron Transfer to Tamm's Extract

摘要

The content of Fe passing to Tamm's extract varies significantly for the same soils depending on the analysis conditions in the laboratory,i.e.,illumination and soil suspension temperature.It was found that the scattered light of luminous lamps alters the iron release insignificantly as compared to the treatment in the dark.However,the effect of soil suspension temperature is substantial.A procedure has been developed for assessing the suspension temperature influence on the solubility of iron compoundsin soils.It is based on the determination of Fe release kinetics at the arbitrary temperature of suspension and the calculation of the dissolution constant for iron compounds in soil.