Table 2. Experimental Van Deemter Parameters Obtained to Determine Column Efficiency for Peptides 1 and 2.

peptide N°: sequence		Chromolith	SunShell	Acclaim
1: RRWQWR	A (mm)	0.043	0.14	0.24
	B (mm/s)	0.049	0.0011	0.20
	C (mm × s)	4.11 × 10–5	2.0 × 10–4	1.2 × 10–4
	uopt (mm/s)	34.74	2.74	40.59
	Hmin (mm)	0.046	0.14	0.25
	R2a	0.96	0.97	0.95
2: (RRWQWRFKKLG)2-K-Ahx	A (mm)	0.053	0.24	0.32
	B (mm/s)	1.71	0.90	0.087
	C (mm × s)	0.0036	0.0019	0.002
	uopt (mm/s)	68.88	0.24	6.24
	Hmin (mm)	0.10	0.32	0.34
	R2a	0.95	0.99	0.97

^aPearson’s correlation coefficient between the experimental values and the theoretical model.