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Improved MALDI imaging MS analysis of phospholipids using graphene oxide as new matrix.


ABSTRACT: Matrix assisted laser desorption/ionization (MALDI) imaging mass spectrometry (IMS) is an increasingly important technique for detection and spatial localization of phospholipids on tissue. Due to the high abundance and being easy-to-ionize of phosphatidylcholine (PC), therefore, selecting matrix to yield signals of other lipids has become the most crucial factor for a successful MALDI-IMS analysis of phospholipids. Herein, graphene oxide (GO) was proposed as a new matrix to selectively enhance the detection of other types of phospholipids that are frequently suppressed by the presence of PC in positive mode. Compared to the commonly used matrix DHB, GO matrix significantly improved signal-to-noise ratios of phospholipids as a result of its high desorption/ionization efficiency for nonpolar compounds. Also, GO afforded homogeneous crystallizations with analytes due to its monolayer structure and good dispersion, resulting in better reproducibility of shot-to-shot (CV?

SUBMITTER: Wang Z 

PROVIDER: S-EPMC5353552 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature

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Improved MALDI imaging MS analysis of phospholipids using graphene oxide as new matrix.

Wang Zhongjie Z   Cai Yan Y   Wang Yi Y   Zhou Xinwen X   Zhang Ying Y   Lu Haojie H  

Scientific reports 20170315


Matrix assisted laser desorption/ionization (MALDI) imaging mass spectrometry (IMS) is an increasingly important technique for detection and spatial localization of phospholipids on tissue. Due to the high abundance and being easy-to-ionize of phosphatidylcholine (PC), therefore, selecting matrix to yield signals of other lipids has become the most crucial factor for a successful MALDI-IMS analysis of phospholipids. Herein, graphene oxide (GO) was proposed as a new matrix to selectively enhance  ...[more]

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