Table 5.

PCA scores plots, white diamonds represent samples taken 1–5 days post‐birth, black squares 6–10 days, white stars >10 days, model characteristics are displayed below

	PCA models	R 2	Components	Outliers	t[1]	t[2]	Scaling
A	NMR aqueous	0.406	2	3	0.27	0.128	UV
B	CE‐MS; Positive mode	0.333	1a	0	0.23		Par
C	HPLC‐MS,	0.457	2	2	0.37	0.08	UV
D	NMR Lipid	0.484	2	3	0.35	0.12	UV
E	UPLC‐MS; Positive mode lipid	0.567	2	0	0.39	0.17	Par
F	UPLC‐MS; Negative mode lipid	0.331	2	0	0.23	0.1	UV
G	GCMS, Single phase	0.337	2	1	0.19	0.14	UV

^aSecond component was used for plotting purposes only.