TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Compound: The mineral metal is magnesium, calcium, strontium, zinc, copper, iron, silver, aluminum, boron and titanium ion.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The acid solution is an organic acid or an inorganic acid such as hydrochloric acid, formic acid, acetic acid, propionic acid, phosphoric acid, lactic acid, malic acid, succinic acid, nitric acid, oxalic acid and adipic acid. The amino acid is aspartate or glutamate having negative charge. Preferred Composition: The acid solution has concentration of 0.1-0.2% (w/v).    TECHNOLOGY FOCUS - POLYMERS - Preferred Property: The degree of acetyl group removal of chitosan is 50-99.9%. The chitosan has average molecular weight of 1000-1500000 g/mole. The colloidal solution has particle size of 20 mm to 500 nm. Preferred Composition: The chitosan has concentration of 0.01-5% (w/v). The volume of the chitosan acid solution is 50-99.9% with respect to colloidal volume. The amino acid chelated mineral solution has concentration of 1 mM-1 M and volume of 0.1-50% with respect to colloidal volume. Preferred Compound: The delivery molecule is short-chained peptide molecule. The amino acid contains 2-30 molecules. EXAMPLE - Chitosan (10 g) in which 90% of N-acetyl group was removed, was dissolved in 3% acetic acid at 70degrees C. The mixture is agitated at speed of 50 rotations per minute for 30 minutes, to obtain chitosan-acetic acid solution. Then, thymopentin solution (10 ml) was added as delivery molecule solution to the chitosan-acetic acid solution and agitated for 1 hour. The mixture was made homogeneous by mixing at speed of 10500 rotations per minute. Simultaneously amino acid chelated mineral solution (aspartate) (200 ml) was added to the mixture and agitated, to obtain a weak acid. The weak acid solution was neutralized by adding buffer having pH of 7, to obtain colloidal solution with encapsulated polymer matrix. The obtained polymer matrix had average particle size of 157 nm, encapsulation rate of 83% and excellent accumulative release rate.