|Supercritical CO2 extraction of Nannochloropsis sp.: a lipidomic study on the influence of pretreatment on yield and composition|Elst, K.; Maesen, M.; Jacobs, G.; Bastiaens, L.; Voorspoels, S.; Servaes, K. (2018). Supercritical CO2 extraction of Nannochloropsis sp.: a lipidomic study on the influence of pretreatment on yield and composition. Molecules 23(8): 1854. https://hdl.handle.net/10.3390/molecules23081854
In: Molecules. MDPI: Basel. ISSN 1420-3049
Nannochloropsis D.J.Hibberd, 1981 [WoRMS]
Nannochloropsis sp.; supercritical CO2 extraction; microalgae;pretreatment; lipidomic; UHPLC-PDA-HR-MS; glycolipids; phospholipids;glycerides; mass transfer limitations
|Auteurs|| || Top |
- Elst, K.
- Maesen, M.
- Jacobs, G.
- Bastiaens, L.
- Voorspoels, S.
- Servaes, K.
Algal lipids have gained wide interest in various applications ranging from biofuels to nutraceuticals. Given their complex nature composed of different lipid classes, a deep knowledge between extraction conditions and lipid characteristics is essential. In this paper, we investigated the influence of different pretreatments on lipid extraction with supercritical CO2 by a lipidomic approach. Pretreatment was found to double the total extraction yield, thereby reaching 23.1 wt.% comparable to the 26.9 wt.% obtained with chloroform/methanol. An increase in acylglycerides was concurrently observed, together with a nearly doubling of free fatty acids indicative of partial hydrolysis. Moreover, an alteration in the distribution of glyco- and phospholipids was noted, especially promoting digalactosyldiglycerides and phosphatidylcholine as compared to monogalactosyldiglycerides and phosphatidylglycerol. At optimized conditions, supercritical CO2 extraction provided a lipid extract richer in neutral lipids and poorer in phospholipids as compared to chloroform/methanol, though with a very similar fatty acid distribution within each lipid class.