Summary of Study ST002570
This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR001657. The data can be accessed directly via it's Project DOI: 10.21228/M8HQ62 This work is supported by NIH grant, U2C- DK119886.
See: https://www.metabolomicsworkbench.org/about/howtocite.php
This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.
Study ID | ST002570 |
Study Title | Evaluation of Extraction Parameters for the Analysis of Lipid Classes in Plants |
Study Summary | The aim of this study was to preliminary evaluate the lipid profile alterations on Pitcairnia flammea leaves based on variations in solvent proportion and ultrasonic ice bath extraction time, followed by a lipid class-enriched analysis employing chemometric techniques. In the plant extraction method employed, the sample was separated in 3 phases 2 : organic, aqueous and protein phases. The parameters evaluated in our study were different solvent proportion (1:2, 1:3 or 1:4 v/v) and time under ultrasonic in ice-cold bath (10, 20 or 30 min). The extraction solvents were methanol (MeOH) and methyl tert-butyl ether (MTBE). For each condition, experiments were prepared in triplicate resulting in 27 samples. Samples extracted in MeOH:MTBE (1:2 v/v) for 10 min and 20 min ultrasonic bath did not separate in three phases. Then, their organic phase chromatographic analyses were not performed resulting on 42 experimental samples chromatograms. Ultra-high performance liquid chromatography coupled to electrospray ionization mass spectrometry (UHPLC-ESI-MS) was used to acquire raw data and MS-DIAL and MetaboAnalyst platforms were used to perform data preprocessing and statistical analysis. The statistical analysis of UHPLC-ESI-MS data in both ionization modes enabled the visualization of a trend distribution based on extraction time. Furthermore, we were able to establish that the solvent proportion had a greater impact on group separation in data samples extracted for 30 min versus 10 and 20 min. Moreover, diacylglycerol or/and lysophophatidylcholine are lipid subclasses that can be favored depending on the extraction time in the MS analyses using positive ESI mode. |
Institute | University of Campinas |
Department | Chemistry's Institute |
Laboratory | Laboratory of Bioanalytics and Integrated Omics |
Last Name | Matos |
First Name | Taynara |
Address | Rua Josué de Castro, s/n – Cidade Universitária, 13083-970, Campinas – SP, Brazil |
t262827@dac.unicamp.br | |
Phone | (85)996154192 |
Submit Date | 2023-04-17 |
Raw Data Available | Yes |
Raw Data File Type(s) | raw(Thermo) |
Analysis Type Detail | LC-MS |
Release Date | 2023-06-01 |
Release Version | 1 |
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Sample Preparation:
Sampleprep ID: | SP002677 |
Sampleprep Summary: | Lipid extraction was based on Hummel et al. Method. 10 mL of solvent mixture were prepared in 3 different proportions - 1:2, 1:3 or 1:4 (v/v) -, pre-cooled at 20 ºC methanol (MeOH) and methyl tert-butyl ether (MTBE). In 2 mL tubes, 50 mg of macerated sample were added and 1 mL of the solvent mixture. The samples were incubated for 5 min under agitation at 500 rpm at 4 ºC, followed by an ultrasonication in ice-cold bath in different times (10, 20, 30 minutes). Each condition was performed in technical triplicate, totalizing 27 samples. After adding 500 µL mixture of water type I:MeOH (3:1 v/v), the samples were vortexed and centrifuged for 5 min at 4 ºC, 10000 rpm. The three phases were separated and dried in a vacuum concentrator, at ambient temperature under vacuum - alcoholic mode, and stored at -80 ºC until the chromatographic analysis. |