Various food additives – preservatives (benzoic acid, sorbic acid, and their salts), sweeteners (Acesulfame K,  saccharine and its salts) and others are widely used in food industry for the improvement of food products  properties and extension of storage life. The amount of these additives in food products is regulated by  technical instructions and other norms.  The method is used for measuring the concentrations of preservatives (sorbic and benzoic acids and their  salts) and sweeteners (acesulfame К, saccharin and its salts) in food products and raw materials, and  dietary supplements.