. 2015 Mar 19;6:57. doi: 10.3389/fphys.2015.00057

Table 1.

Detected CHNO-containing ions and relative abundance.

Ion	m/z	Mole fraction (at %)	Ion	m/z	Mole fraction (at %)
C²⁺	6	0.01	CO⁺, C₂H⁺₄	28	0.1
N²⁺	7	0.01	CHO⁺, C₂H⁺₅	29	0.1
C⁺	12	0.1	CH₂O⁺, NO, C₂H⁺₆	30	0.07
CH⁺	13	0.06	CNO⁺, C₂H₂O⁺, C₃H⁺₆	42	0.02
N⁺, CH⁺₂, CO²⁺	14	0.03	CHNO⁺, C₂H₃O⁺, C₃H⁺₇	43	0.03
NH⁺, CH⁺₃	15	0.06	CO⁺₂, CH₂NO⁺, C₃H⁺₈	44	0.1
			CO₂H⁺	45	0.08

Ions in bold face fonts indicate the identity used for mass spectral decomposition (last column of composition table).