Rapid Quantification of Yeast Lipid using Microwave-Assisted Total Lipid Extraction and HPLC-CAD
Artikel i vetenskaplig tidskrift, 2013

We here present simple and rapid methods for fast screening of yeast lipids in Saccharomyces cerevisiae. First we introduced a microwave-assisted technique for fast lipid extraction that allows the extraction of lipids within 10 min. The new method enhances extraction rate by 27 times, while maintaining product yields comparable to conventional methods (n = 14, P > 0.05). The recovery (n = 3) from spiking of synthetic standards were 92 +/- 6% for cholesterol, 95 +/- 4% for triacylglycerol, and 92 +/- 4% for free fatty acids. Additionally, the new extraction method combines cell disruption and extraction in one step, and the approach, therefore, not only greatly simplifies sample handling but also reduces analysis time and minimizes sample loss during sample preparation. Second, we developed a chromatographic separation that allowed separation of neutral and polar lipids from the extracted samples within a single run. The separation was performed based on a three gradient solvent system combined with hydrophilic interaction liquid chromatography-HPLC followed by detection using a charged aerosol detector. The method was shown to be highly reproducible in terms of retention time of the analytes (intraday; 0.002-0.034% RSD; n = 10, interday; 0.04-1.35% RSD; n = 5) and peak area (intraday; 0.63-6% RSD; n = 10, interday; 4-12% RSD; n = 5).


Sakda Khoomrung

Kemi- och bioteknik, Livsvetenskaper, Systembiologi

Pramote Chumnanpuen

Kemi- och bioteknik, Livsvetenskaper, Systembiologi

Suwanee Jansa-Ard

Kemi- och bioteknik, Livsvetenskaper, Systembiologi

Marcus Ståhlman

Göteborgs universitet

Intawat Nookaew

Kemi- och bioteknik, Livsvetenskaper, Systembiologi

Jan Borén

Göteborgs universitet

Jens B Nielsen

Kemi- och bioteknik, Livsvetenskaper, Systembiologi

Analytical Chemistry

0003-2700 (ISSN) 1520-6882 (eISSN)

Vol. 85 4912-4919


Analytisk kemi


Livsvetenskaper och teknik