The solubility properties of the zinc chloride- amino acids（Leu/Try/Val/Thr）- water systems at 25℃ in the whole concentration range have been investigated by equilibrium method, the corresponding phase diagrams and refractive index curves were constructed. The results indicate the formation of the congruently soluble compound of Zn（Leu）Cl2（ A） in Leu system and the incongruently soluble compounds of Zn（Try）Cl2· 1/2H2O（B）、 Zn（Val）Cl2· H2O（C）、 Zn（Val）2Cl2（D）、 Zn（Thr）Cl2· H2O（E） and Zn（Thr）2Cl2（F） in Try/Val/Thr systems, which have not been reported in literature. According to the phase equilibrium result, six solid complexes have been prepared in water, and their compositions have been determined by chemical analysis which are consistent with the results of phase diagrams.
The solubility properties of ZnSO 4 AA H 2O system at 25℃ in the whole concentration range were investigated by phase equilibrium method,and the corresponding phace diagram and refractive index diagram were constructed.The results indicate that systems are simple,and do not have new compound.The complexes of Zn(Leu)SO 4·0.5H 2O,Zn(Thr)SO 4·H 2O,Zn(Val)SO 4·H 2O which have not been reported in literature were prepared and characterized.
The solubility of ZnSO 4 Try H 2O System at 25℃ in the whole concentration range have been investigated by phase equilibrium method,and the corresponding equilibrium diagrams have been constrcuted.The result indicates that system is simple and free from any inpurity.The compound of Zn(Try) 2 which is not reported in literatures has been prepared and characterized.
