Skip to main content

View full-text article in PMC

. Author manuscript; available in PMC: 2015 Oct 1.

Published in final edited form as: Trends Analyt Chem. 2014 Oct 1;61:192–206. doi: 10.1016/j.trac.2014.04.017

Table 1.

Molecular species formed during electrospray ionization of lipids

Lipid class	Positive mode	Negative mode
LPC, PC	[M + H]⁺, [M + Na]⁺	[M–H]^–, [M + HCOO]^–, [M + CH₃COO]^–
LPE, PE	[M + H]⁺, [M + Na]⁺	[M–H]^–
PG	[M + H]⁺, [M + NH₄]⁺, [M + Na]⁺	[M–H]^–
PI	[M + H]⁺, [M + NH₄]⁺	[M–H]^–
PS	[M + H]⁺	[M–H]^–
PA		[M–H]^–
CE	[M + NH₄]⁺
SM	[M + H]⁺	[M + HCOO]^–
Cholesterol	[M–H₂O+H]⁺
Cer, GluCer, LacCer	[M + H]⁺, [M + NH₄]⁺, [M + Na]⁺	[M–H]^–, [M + HCOO]^–
MG, DG, TG	[M + NH₄]⁺, [M + Na]⁺
MGDG, DGDG, SQDG	[M + NH₄]⁺, [M + Na]⁺	[M–H]^–
Fatty acids		[M–H]^–
CL	[M + H]⁺, [M + NH₄]⁺, [M + Na]⁺	[M–H]^–
Cer	[M + H]⁺, [M + NH₄]⁺, [M + Na]⁺	[M–H]^–