DETERMINATION OF EXPIRY DATE OF FOOD ADDITIVES OBTAINED FROM SECONDARY RESOURCES OF PEAR PROCESSING

The article presents the results of determining the expiry date of Grushevaya food supplement obtained from the secondary resources of the processing of «Conference» pears. The use of secondary resources to obtain finished products in the form of food additives and the assessment of their consumer properties is an urgent task. One of the important consumer properties of food products is its storability along with organoleptic, physical and chemical and functional properties, as well as safety and nutritional value, which determines its shelf life,
The aim of the research is to determine the shelf life of Grushevaya supplement. Changes in microbiological safety indicators during storage of Grushevaya food supplement, namely, the number of mesophilic aerobic and facultative anaerobic microorganisms (QMAFAnM), the number of molds, bacteria of Escherichia coli group (coliforms) and pathogenic microorganisms have been studied, and 18 months period has been established as its shelf life. It has been found that during the shelf life the loss of vitamin C and polyphenolic compounds in its composition is 5.5 % and 4.8 %, respectively. It has been revealed that the antioxidant activity, determined in experiments in vitro and in vivo of the food supplement after 18 months of storage differs slightly compared with those for a freshly prepared supplement.
The same pattern has been established in in vivo experiments on manifestation of hepatoprotective properties in freshly prepared supplement after 18 months of storage.

shelf life, Grushevaya nutritional supplement, microbiological indicators, safety, loss of micronutrients, properties

1. The strategy of scientific and technological development of the Russian Federation until 2030, approved by Decree of the President of the Russian Federation of December 1, 2016 No. 642.

2. GOST 10444.15-94 Food Products. Methods for determining the amount of mesophilic aerobic and facultative anaerobic microorganisms. M.: Standartinform, 2010.7 p.

3. GOST 31747-2012 Food products. Methods for identifying and determining the number of bacteria of Escherichia coli group (coliform bacteria). M.: Standartinform, 2014. 14 p.

4. GOST 31659-2012 Food Products. Method for detecting bacteria of the Salmonella genus. M.: Standartinform, 2014. 20 p.

5. GOST 10444.12-2013 Microbiology of food and animal feed. Methods for detecting and counting the number of yeast and molds. M.: Standartinform, 2014.9 p.

6. GOST 26669-85. Food and taste products. Sample preparation for microbiological analysis. M.: Standartinform, 2010. 9 p.

7. GOST 24556-89 Products of fruits and vegetables processing. Methods for vitamin C determination. M.: Standartinform, 2001. 11 p.

8. Methodological and analytical support for gardening research / ed. by E.A. Egorov. Krasnodar: NCSRIHV, 2010. 310 p.

9. Yashin A.Ya., Chernousova N.I. Determination of the content of natural antioxidants in food products and dietary supplements // Food Industry. 2007. No. 5. P. 28-30.

10. Roginsky V., Lissi E. A. Review of methods to determine chain-breaking antioxidant activity in food // Food Chem. 2005. Vol. 92. P. 235-254.

11. On food safety CU TR 09/12/2011: technical regulations of the Customs Union, approved by Decision of the Customs Union Commission dated 09.12.2011. No. 880.