Handbook of Advanced Chromatography / Mass Spectrometry Techniques
Chapter 5 - Porous Monolithic Layers and Mass Spectrometry
Frantisek Svec and Yongqin Lv

Figure 5-12. Mass spectrum of caffeine desorbed/ionized from surface of porous butyl methacrylate-based monolith obtained immediately after preparation of the spot and spectrum of the same spot recorded 3 weeks after the previous one.

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