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Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (24): 2981-2986.DOI: 10.6023/A1104171 Previous Articles Next Articles
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周海超*, 林益明*, 柴纬明, 魏淑东, 廖蒙蒙
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教育部新世纪优秀人才支持计划;国家自然科学基金
ZHOU Hai-Chao, LIN Yi-Ming, CHAI Wei-Ming, WEI Shu-Dong, LIAO Meng-Meng
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Condensed tannins from litchi seed were analyzed using reflectron modes and linear modes of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The reflectron modes (accelerating voltage, 20.0 kV|reflectron voltage, 23.0 kV|delayed extraction voltage, 16.32 kV|lens voltage, 9.45 kV) spectra obtained clear information on basic unit, interflavan linkage and polymerization degree extended from 3-mers to 18-mers. The linear modes (accelerating voltage, 20.0 kV|delayed extraction voltage, 16.25 kV|lens voltage, 10.0 kV) spectra further expanded the detectable polymers up to 27-mers. Litchi seed condensed tannins were A-type procyanidins polymer with as high as 27-mers. In the present study, reflectron modes coupled with linear modes was discussed as a potential method of MALDI-TOF MS in characterization of condensed tannins.
Key words: matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, reflectron mode, linear mode, litchi seed, condensed tannins
ZHOU Hai-Chao, LIN Yi-Ming, CHAI Wei-Ming, WEI Shu-Dong, LIAO Meng-Meng. Characterization of Condensed Tannins from Litchi Seed by Reflec-tron Modes and Linear Modes of MALDI-TOF MS[J]. Acta Chimica Sinica, 2011, 69(24): 2981-2986.
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