质谱法
色谱法
样品制备
化学
脂多糖学
分析化学(期刊)
基质辅助激光解吸/电离
基质(化学分析)
飞行时间质谱
表面增强激光解吸/电离
解吸
样品(材料)
电离
质谱中的样品制备
临床化学
离子
电喷雾电离
有机化学
生物化学
吸附
作者
Adrian Arendowski,Ewelina Maślak,Wioletta Miśta,Piotr Fijałkowski,Michał Złoch,Dorota Gabryś,Paweł Pomastowski
出处
期刊:Lipids
[Wiley]
日期:2023-12-07
卷期号:59 (1): 13-26
被引量:2
摘要
Abstract Lipids are one of the cell components therefore it is important to be able to accurately assess them. One of the analytical techniques used to study lipid profiles is matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI TOF MS). The present study attempted to select optimal conditions for sample preparation and MALDI MS analysis of bacterial lipidome in both positive and negative ion modes using different extraction protocols—Folch, Matyash, and Bligh & Dyer, solvents used to apply samples, and matrices such as 9‐aminoacridine (9‐AA), α‐cyano‐4‐hydroxycinnamic acid (CHCA), 2,5‐dihydroxybenzoic acid (DHB), 2‐mercaptobenzothiazole (MBT), and 2,4,6‐trihydroxyacetophenone (THAP). The obtained results allowed concluding that DHB or CHCA matrices are suitable for lipid analysis in the positive mode, and in the negative mode THAP or 9‐AA. The most appropriate protocol for extracting lipids from bacterial cells was the Bligh & Dyer method in both ionization modes. The use of the solvent TA30, which was a mixture of acetonitrile and 0.1% trifluoroacetic acid in water, provided on the spectra a significant number of signals from lipids in all groups analyzed, such as fatty acyls, glycerolipids, and glycerophospholipids.
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