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Journal of Analytical Science and Technology
Fig. 3 | Journal of Analytical Science and Technology

Fig. 3

From: Quantitative analysis of vitamin D using m/MALDI-TOF mass spectrometry based on a parylene matrix chip

Fig. 3Fig. 3

Chemical derivatization of vitamin D. a Reaction diagram between the betaine aldehyde cation and the hydroxyl group of an alcohol in vitamin D. b Comparison of CHCA matrix and parylene matrix chip for the analysis of vitamin mixtures after BA derivatization. c Reaction diagram of the acid-induced degradation and the mass spectrum of the product of derivatization. d Reaction diagram of PTAD and vitamin D and the mass spectrum of the product of PTAD derivatization

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