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Analysis of keto-enol tautomers of curcumin by liquid chromatography/mass spectrometry |
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| Authors: | Shin-ichi Kawano Yusuke Inohana Yuki Hashi Jin-Ming Lin |
| Affiliation: | a Department of Chemistry, Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Tsinghua University, Beijing 100084, China;b Shimadzu Global COE for Application & Technical Development, Shimadzu (China) Co., Ltd., Shanghai 200052, China;c Global Application Development Center, Shimadzu Corporation, Kyoto 604-8511, Japan |
| Abstract: | Keto-enol tautomers of curcumin were confirmed by reversed-phase liquid chromatography (RPLC)/ hybrid quadrupole ion trap/time-of-flight mass spectrometry (QIT/TOFMS). Tautomers gave different MS/MS spectra in negative mode. Different mass spectra were also obtained by hydrogen/deuterium exchange LC/MS/MS in positive mode. Our results suggest that enol form is the major form in the solution (water/acetonitrile). |
| Keywords: | Keto-enol tautomer Curcumin Liquid chromatography/mass spectrometry |
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