Ultra High-Mass Resolution Paper Spray by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

Table 3

CLSE compounds identified using paper spray mass spectrometry. The phospholipids detected are denoted using the lipid numbers nomenclature to indicate degrees of unsaturation, and PC refers to phosphatidylcholine. The CLSE mass spectrum was obtained with excitation and detection frequency range of 1.5 MHz.

Experimental m/z	Theoretical m/z	Mass measurement error (Δppm)	Mass resolving power (M/ΔM50%)	Compound
728.52151	728.52008	1.96	61637	16 : 0/14 : 0 PC [M+Na]^+
732.55505	732.55378	1.73	60967	16/16 PC [M+H]^+ 1 degree of unsaturation
734.57100	734.56943	2.14	62820	16 : 0/16 : 0 PC [M+H]^+
754.53660	754.53572	1.17	57074	16/16 PC [M+Na]^+ 1 degree of unsaturation
756.55257	756.55137	1.59	57597	16 : 0/16 : 0 PC [M+Na]^+
760.58591	760.58508	1.09	55950	16/18 PC [M+H]^+ 1 degree of unsaturation
782.56728	782.56702	0.33	52802	16/18 PC [M+Na]^+ 1 degree of unsaturation
798.54114	798.54096	0.23	48188	16/18 PC [M+K]^+ 1 degree of unsaturation
808.58322	808.58267	0.68	48764	18/18 PC [M+Na]^+ 2 degrees of unsaturation