Table 1.

Performance of commercially available columns (n = 3)

Column	Acetophenone—4-Methoxyacetophenone 400mg				Acetophenone—4-Methoxyacetophenone 2 g				2-Nitroaniline—4-Nitroanilinea 2 g
	k	α	N	R b s	k	α	N	R b s	k	α	N	R b s
Biotage® SNAP™	8.22	2.81	≈54	c	7.67	0.59d	c	c	7.23	3.34	c	c
ISCO® RediSep™	6.55	3.00	122	0.29c	6.24	0.71	43	0.67	6.28	3.05	13.7	1.23
Silicycle® SiliaFLASH™	6.28	2.96	153	2.49c	5.96	0.68	59	1.62	6.11	3.29	15.3	1.39
Thomson SINGLE StEP™	5.29	3.35	137	2.39c	5.76	1.03	53	1.66	4.44	2.91	18.7	1.20

^a Estimated from printed data

^b From Eq. 1

^c Not calculated due to insufficient resolution

^d (n = 2)