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 ZnSO4- Leu- H2O system at 25℃ in the whole concentration range have been investigated by phase equilibrium method, and the corresponding phase diagrams and rafractive index- composition curve have been constructed.The result indicate that system is simple system, which do not exist any compound. Referred to literature, the compound of Zn(Leu)SO4· 12H2O、 Zn(Leu)2 which are not reported in literature have been prepared. Their composition have been determined by chemical analysis and elemental analysis. Their propeties have been characterized by IR spectra, XRD and TG- DTG.
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.
