Abstract
Passiflora edulis Flavicarpa, Passiflora edulis Sims, and Passiflora ligularis Juss are Colombian fruits (passion fruits) of important exportation value. They act efficiently as antioxidants, antifungal, and antimicrobial compounds due to their high polyphenol content. Polyphenols can be quantified by the Folin-Ciocalteu (F-C) reaction. Food matrices, solvent polarity, and several different reacting conditions are critical for the optimum extraction and quantification of polyphenols. Chromatographic identification and quantitation are satisfactory with access to a vast number of reference standards considering the availability of abundant phenolic compounds in crude extracts. The purpose of this study was to evaluate alternatives and specific F-C reacting conditions aiming at determining the highest total phenolic content (TPC) in three Colombian Passifloras. Among optimum reacting conditions, reduced reaction time and diluted alkali conditions yielded desirable positive results highlighting lower working time and minimum reagent waste production. For higher extraction yield, acetone 70% was the best solvent to capture more phenolics from the seedless pulp of these Colombian passion fruits.
Highlights
Fruits in the Passifloraceae family, mainly native to Central and South America, comprise over 450 different species [1, 2]
This study reports results for Passifloras cultivated in Colombia at altitudes between 1000 and 2000 meters above sea level (m.a.s.l.)
The highest percent yield of extracts was registered for P. edulis
Summary
Fruits in the Passifloraceae family, mainly native to Central and South America, comprise over 450 different species [1, 2]. Passiflora edulis Flavicarpa, yellow passion fruit or maracuyá, is a popular and year-long harvested Colombian fruit It is produced, in a lower scale, in Australia, New Zealand, and Southeastern Asia [4]. In a lower scale, in Australia, New Zealand, and Southeastern Asia [4] This Passiflora offers several medical contributions, such as antioxidant, tranquilizer, and sedative, and it is normally consumed as fresh fruit, in juices, or as infusions [1]. Another less investigated fruit in this family is the Passiflora edulis Sims, known in Colombia as purple passion fruit or gulupa [5]. In the year 2017, the country exported more than 38,000 tons of gulupa [8]
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