Experimental Pharmaceutical Sciences

This book describes different analytical method determinations. The acidity or alkalinity of an aqueous solution is traditionally represented by pH values. The pH is a measure of hydrogen-ion activity and is essential in terms of physiological appropriateness and stability. Another application of UV spectroscopy is the identification of unknown compounds. By comparing an unknown compound''s spectrum to known spectra it can be identified. When two spectra coincide the compounds are the same. Any colored or uncolored substance will absorb radiation in the wavelength region. Coloured and colorless absorb light of different wavelengths in different manners and hence we get an absorption curve in a unique pattern.