Pressurized liquid extraction of bioactive compounds from blackberry (Rubus fruticosus L.) residues: a comparison with conventional methods

Obtaining anthocyanin-rich extracts from frozen açai (Euterpe oleracea Mart.) pulp using pressurized liquid extraction

“…This result disagrees with the observations of Machado et al (2014) in an anthocyanin extraction process from blackberry residues, where the temperature had a positive effect on the overall yield. The anthocyanins identified in the blackberry extracts showed higher yields when the PLE process was Table 1.…”

“…As shown in Table 1, the anthocyanin C3R represents the highest content in the total composition of anthocyanins in the frozen açai pulp. This behavior is uncommon in açai fresh pulp and blackberry (Rubus fruticosus L.) residues, according to values reported by Del Pozo-Insfran et al (2004) and Machado et al (2014), respectively, where the anthocyanin C3Gl is the predominant compound in the extracts. This difference can be explained due to process conditions through which the raw material used in this work was obtained, and the water content in the raw material (Welch et al, 2008;Yamaguchi et al, 2015).…”

“…The growing interest in the recovery of biocompounds such anthocyanins from vegetal matrices with possible applications in the food, pharmaceutical and cosmetic industries represents an important opportunity (Machado et al, 2014). Anthocyanins are generally extracted using methanol, ethanol, acetone, water or a mixture of these solvents (Welch et al, 2008).…”

“…The PLE process has become a feasible alternative for recovering bioactive compounds from vegetal feedstock (Liazid et al, 2014;Liu et al, 2014;Machado et al, 2014 solvent extraction (ASE), pressurized solvent extract ion (PSE) or enhanced solvent extraction (ESE). As the extraction process is performed using high pressures, the solvent remains in a liquid state, even when the temperatures are above the boiling point of the solvent (Richter et al, 1996).…”

Applications of subcritical and supercritical water conditions for extraction, hydrolysis, gasification, and carbonization of biomass: a critical review

“…For example, anthocyanins, a valuable class of compounds present in blackberry residues, are extracted most efficiently using acidified water and temperatures between 60 and 80 °C. The remaining phenolics of blackberry residues could then be extracted by increasing the temperature and by a using alcohol/water mixture as the extraction solvent ( Machado et al, 2015). This example implies the importance of the optimization of acidity for recovery of a specific target compound.…”