Volumetric properties of Threonine(C4H9NO3), Arginine (C6H14N4O2), Histidine (C6H9N3O4) & Tyrosine (C9H11NO3) in aqueous solutions of Nitrates at T =298.15K, in terms of Linear, Exponential, Second Order Polynomial and Third Order polynomial has been calculated using volumetric approach. The densities, Partial molar volumes and transfer partial molar volumes have been calculated on the basis of density measurements of Threonine(C4H9NO3), Arginine...