SPECTROPHOTOMETRY APPLICATION AT PRESERVATIVES DETERMINATION IN LOW-ALCOHOLIC AND NON-ALCOHOLIC PRODUCTS
On the basis of developed and metrologically certified method for sorbic acid mass concentration measuring in wine production by spectrophotometric method, a similar method for benzoic acid (BA) determination is being developed. Studies were conducted to establish optimal wavelength when measuring optical density of benzoic acid solutions, and calibration characteristic was used to determine BA concentration in range from 50 to 800 mg/dm3. Benzoic acid concentrations in several industrial samples of low-alcohol products were determined by spectrophotometric method.