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Figure 3 | Plant Methods

Figure 3

From: Wax ester profiling of seed oil by nano-electrospray ionization tandem mass spectrometry

Figure 3

Collision-induced dissociation mass spectra of wax ester standards. Spectra were obtained from positive nano-ESI-MS/MS of the ammonium adduct [M+NH4]+ precursor ion representing the fragmentation pattern of seven wax ester prototype groups. Wax ester dissociate into characteristic analytical product ions (A) presenting the protonated acid ion a: [RCO2H2]+, the acylium ion b: [RCO]+, the dehydrated acylium ion c: [RCO – H2O]+ and the alcohol-specific loss of fatty acid fragment [R´ ]+ with R and R´ representing the fatty acid or the alcohol moiety, respectively. The mass spectra (B-H) show fragmentation patterns of wax esters as labeled. Analytical fragment ions a-d are labeled in accordance to (A).

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