Table 3. Lipid standards used for mass spectrometry.

Lipid class	m/z	c (pmol/µl)
CE 16:0	642	7.52
SM 12:0	647	0.73
PC 40:2	842	0.29
Cer 12:0	482	0.73
LPC 14:0	468	0.73
TAG 42:0	740	1.45
PE 28:0	636	0.29
PS 28:0	676	0.29

Lipid standards used for mass spectrometric analysis of the atherosclerotic plaques, excised aortic valves and extracellular lipid particles isolated from stenotic aortic valves. Each analyzed sample was spiked with the standard mixture for quantitative measurement and the abundances of each lipid species were calculated as mole percentages.