The dual circuits laser detector was used to measure the solubility and super-solubility of uridine-5′-monophosphate disodium salt in the ethanol-aqueous mixture of different ethanol mass fractions at 293.2—318.2 K.In addition
the effects of agitation rate
pH value and Na+ concentration on the width of metastable zone were explored respectively.It was found that the solubility data might be described well by the model of λh equation; furthermore the mixing enthalpy and the crystallization enthalpy of uridine-5′-monophosphate disodium salt in mixture were determined.Similar to the solubility
the super-solubility increased with the increase of temperature and decreased with the increase of ethanol mass fraction.Under the same experimental conditions
increase of pH value
Na+ concentration or decrease of agitation rate might broaden the width of metastable zone.