A fast and direct liquid chromatography-mass spectrometry method to detect and quantify polyunsaturated aldehydes and polar oxylipins in diatoms

Abstract:

Polyunsaturated aldehydes (PUAs) are a group of microalgal metabolites that have attracted a lot of attention due to their biological activity. Determination of PUAs has become an important routine procedure in plankton and biofilm investigations, especially those that deal with chemically mediated interactions. Here we introduce a fast and direct derivatization free method that allows quantifying PUAs in the nanomolar range, sufficient to undertake the analysis from cultures and field samples. The sample preparation requires one simple filtration step and the initiation of PUA formation by cell disruption. After centrifugation the samples are ready for measurement without any further handling. Within one chromatographic run this method additionally allows us to monitor the formation of the polar oxylipins arising from the cleavage of precursor fatty acids. The robust method is based on analyte separation and detection using ultra high performance liquid chromatography-atmospheric pressure chemical ionization mass spectrometry (UHPLC-APCI MS) and enables high throughput investigations by employing an analysis time of only 5 min. Our protocol thus provides an alternative and extension to existing PUA determinations based on gas chromatography-mass spectrometry (GC-MS) with shorter run times and without any chemical derivatization. It also enables researchers with widely available LC-MS analytical platforms to monitor PUAs. Additionally, non-volatile oxylipins such as ω-oxo-acids and related compounds can be elucidated and monitored.

SEEK ID: https://data.chembiosys.de/publications/52

DOI: 10.1002/lom3.10143

Projects: A1, C1, C5, Z01

Publication type: Not specified

Journal: Wiley-Blackwell

Citation:

Date Published: 15th Oct 2016

Registered Mode: Not specified

Help
help Creator
Creators
Not specified
Submitter
Citation
Kuhlisch, C., Deicke, M., Ueberschaar, N., Wichard, T., & Pohnert, G. (2016). A fast and direct liquid chromatography-mass spectrometry method to detect and quantify polyunsaturated aldehydes and polar oxylipins in diatoms. Limnology and Oceanography: Methods, 15(1), 70–79. http://doi.org/10.1002/lom3.10143
Activity

Views: 470

Created: 10th Jul 2017 at 08:52

help Attributions

None

Related items

Powered by
(v.1.10.2)
Copyright © 2008 - 2020 The University of Manchester and HITS gGmbH