Table IV.

Absolute Quantification of Lipid Classes in Bovine Liver; Comparison of Single-Point Internal Standard Method and Multiple-Point Internal Standard Method

Lipid class	BLE 50 ug mL−1				BLE 100 ug mL−1				Declared lipid content wt/wt%
	Single-point		Multiple-point		Single-point		Multiple-point
	Mean	RSD	Mean	RSD	Mean	RSD	Mean	RSD
MG	0.21	5.88	0.16	8.45	0.21	0.74	0.16	1.07
DG	0.54	1.36	0.49	1.46	1.07	5.35	1.01	5.54
TG	12.60	15.72	14.41	15.79	18.24	7.02	20.88	7.04	120
CE	1.19	1.14	0.16	3.50	1.75	1.85	0.40	3.42
PC	14.61	3.02	9.27	2.99	26.94	1.97	40.93	3.57	42
Cer	0.94	5.22	0.62	5.78	1.86	1.10	1.29	1.15
SM	0.74	2.65	0.77	1.61	1.43	2.11	1.22	1.59
LPC	0.16	7.72	1.06	1.01	0.29	1.80	1.17	0.38
PE	8.73	1.18	11.88	1.18	17.79	0.78	24.21	0.78	22
2PI	NA		NA		NA		NA		8
2LPI	NA		NA		NA		NA		1
FC	NA		NA		NA		NA		7
Total	39.72		38.82		69.59		91.26		100

n = 3.

¹Others, incs. neutral lipids.

²Not detectable in POSmode.