Conservation parameters and physicochemical analysis of pomegranate nectar (Punica granatum L.)

Abstract

Pomegranate (Punica granatum L.) is a fruit of significant commercial value in international markets, with its nectar presenting considerable potential in Peru. Ensuring optimal processing parameters for product preservation is therefore essential. This study evaluated the preservation parameters of pomegranate nectar using microbiological and physicochemical tests during storage. Specifically, proximal composition and microbiological quality were monitored over time, and the effects of storage temperature (25 and 10 °C ) and packaging type (plastic bottles and glass bottles) on pH were assessed over a 60-day shelf life period. Results indicated that pH, titratable acidity and soluble solids content increased progressively throughout storage time. However, these physicochemical parameters remained within acceptable limits defined by the Peruvian Technical Standard and the Codex Alimentarius until day 56. Microbiological analysis confirmed product safety, showing colony-forming units (CFU) below 10 and the absence of Salmonella spp. throughout the study. Statistical analysis revealed no significant interaction between storage temperature and packaging type on pH. It is concluded that the determination of these parameters is important for developing commercial strategies that preserve sanitary quality and ensure product viability.