Naslov
Polyphenols recovery from dandelion leaves and roots assisted by high hydrostatic pressure (HPAE) and pressurized liquid extraction (PLE)

Autori
Bursać Kovačević, D., Tenžera, D., Ćuk, A., Putnik, P., Dragović-Uzelac

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

ISBN
9789536893126

Skup
3rd Natural resources green technology & sustainable development-GREEN/3

Mjesto i datum
Zagreb, Hrvatska, 05.06.2018. - 08.06.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
dandelion ; high hydrostatic pressure extraction (HPAE) ; pressurized liquid extraction (PLE) ;

Sažetak
Dandelion ( Taraxacum officinale) leaves and roots are good sources of health-promoting phytochemicals. Generally, applications of modern green extraction techniques, such as High Hydrostatic Pressure Assisted Extraction (HPAE) and Pressurized Liquid Extraction (PLE) showed significant advantages over conventional extractions in terms of less solvent and energy consumption, shorter extraction time, higher yields, etc. Thus, it could be useful for the effective extraction of various bioactive compounds from plant materials. In line with this, the aim of this study was to investigate the use of HPAE and PLE for the recovery of polyphenols from dandelion leaves and roots. Studied parameters for HPAE were: ethanol concentrations (50 and 70%), high pressures (300, and 500 MPa), times (5 and 15 min), and temperatures (22 and 60°C) PLE was conducted at constant static time (5 min) and pressure (10.34 MPa) by varying: ethanol concentrations (50 and 70%), temperatures (60, 80 and 100 °C), and number of extraction cycles (1, 2 and 3). Optimal HPAE parameters for the polyphenols recovery of dandelion leaves and roots was at 5 min, 60°C, and 500 MPa, with 70% ethanol (v/v) that was the most effective solvent for the leaves ; and 50% ethanol (v/v) for the dandelion root extract. Dandelion leaves extract was richer with polyphenols than the root extract (44.99 vs.11.46 mg GAE/g). With respect to PLE, 50% ethanol (v/v) was the most appropriate extraction solvent from both plant matrices. Moreover, optimal PLE conditions with the highest recovery (93.94 mg GAE/g) for the leaves were 60°C with 2 extraction cycles, while for the roots highest yields (5199 mg GAE/g) were achieved under higher temperature and longer extraction time (80°C and 3 extraction cycles). In conclusion, both extraction techniques were suitable for the efficient green recovery of polyphenols from dandelion leaves and roots. However, according to obtained results PLE performance has proven to be more suitable than the HPAE. Therefore, it should be recommended for the fast and effective polyphenols recovery from both, leaves and roots.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

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