Probably the largest ever, in terms of the number of reactions, species and thermodynamic quantities considered, equilibrium speciation model for solubility simulations of stone-forming solids in urine is presented. The thermodynamic database used has been augmented by solubility constants measured in our laboratory. These values as well as literature data are reviewed. The model calculations permit the accurate prediction and assessment of previously reported solubility measurements carried out in various salt solutions and urine-like liquors.
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