Abstract
The solbilities of L-basic amino acids in the type of free, monohydro-chloride and dihydrochloride in water were determined, and the results were formulated as follows.
L-Arginine: log S=0.9770+0.01345t (t is from 0°_??_70°C)
L-Histidine: log S=0.3627+0.00905t (t is from 0°_??_70°C)
L-Arginine monohydrochloride: log S=1.6532+0.01301t (t is from 0°_??_70°C)
L-Lysine monohydrochloride dihydrate: log S=1.6990+0.01294t (t is from 0°_??_55°C)
L-Lysine monohydrochloride monohydrate: log S=1.7404+0.01256t (t is from 55°_??_70°C)
L-Lysine dihydrochloride: log S=2.2138+0.00409t (t is from 0°_??_70°C)
L-Histidine dihydrochloride: log S=1.9085+0.00265t (t is from 0°_??_70°C)
Three component systems (basic amino acid, hydrochloric acid, water) were studied and the solubilities in mixed solution system of alcohol-water were also investigated.
