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. Author manuscript; available in PMC: 2019 Jul 30.
Published in final edited form as: J Phys Chem B. 2016 Jun 15;120(26):6430–6438. doi: 10.1021/acs.jpcb.6b04525

Figure 4: showing the (101, 42) fragmentation product and its sodium adduct at isotopic resolution.

Figure 4:

Depicted is an overlay of parent masses calculated by multiplying the raw m/z signal by the indicated charge (folding). The single-Da peak spacing correspond to isotopic patterns while the larger (22 Da) spacing results from multiple Na+ for H+ substitutions in the p-MBA ligand. The signal shifts to lower masses upon further ionization by deprotonation. Infusion rate is 5 μL/min; particle concentration ~ 0.5 μg/μL; scan duration = 1minute.