ODS-H LC Column. Porosity: 300Å, Length: 100mm, I.D.: 3.0mm, Particle Size: 3µm

L1 (Stainless Steel Hardware). Length: 100mm, I.D.: 3.0mm, pH range: 1-10

ODS-H Example 1.
	The absence of active silanols in kromega Select is illustrated by this standard test mixture which includes both pyridine and phenol. The lack of peak tailing clearly demonstrates the absence of metallic impurities.
1. Pyridine, 2. Phenol
COLUMN	kromega Select ODS-H 5µm
DIMENSIONS	15cm x 4.6mm
MOBILE PHASE	40:60 Acetonitrile:Water
TEMPERATURE	40°C
FLOW RATE	1 ml/min
DETECTION	UV at 254nm
ODS-H Example 2
	Neutral silanol groups can still occasionally cause problems with certain classes of compound. Theobromine, theophylline and caffeine are particularly prone to this effect. In kromega Select this effect is elimated by full end capping.
1. Theobromine, 2. Theophylline, 3. Caffeine, 4. Phenol
COLUMN	kromega Select ODS-H 5µm
DIMENSIONS	15cm x 4.6mm
MOBILE PHASE	25:75 Methanol:Water
TEMPERATURE	30°C
FLOW RATE	1 ml/min
DETECTION	UV at 254nm
ODS-H Example 3.
	Many compounds such as polyphenols interact irreversibly with the active sites on silica based reversed phase materials. In the case of kromega Select ODS-H this problem does not occur, which makes it possible to analyse problematic compounds such as in the ODS-H Example below.
COLUMN	kromega Select ODS-H 5µm
DIMENSIONS	15cm x 4.6mm
MOBILE PHASE	THF:Water:Formic Acid (35:60:5)
TEMPERATURE	40°C
FLOW RATE	0.65 Sl/min
DETECTION	UV at 254nm

This kromega Select HPLC column has a silica packing material that is manufactured using an entirely new process based on well established, tried and tested silica production techniques coupled with new refining technologies which ultimately leads to a superior material.