I'd like to know what's the difference between a Lichrospher Select B column and an Hypersil BDS one. I know that the pore size is different, but if there´s another difference I´d appreciate if someone tells me. Thanks.

Both belong to an older kind of columns than Luna (Phenomenex) or Purospher (Merck) or Symmetry (Waters) and others. These last columns work pretty good with basic compounds without using any amine as silanol suppressing agent. I could send you chromatograms of basic compunds like pseudoephedrine, diltiazem, etc, if you liked to see them. I´ve used both RP select B and Hypersil BDS but the new ones are much better.
Regards

The diference between these two columns can be found by going to www.sciquest.com/columnshopper

This column database allows for the side-by-side comparison of over 90,000 columns within 3,600 trade names from over 100+ suppliers. There are over 200 base deactivated columns on the market.

Tradename: Hypersil BDS
Phase Name:C8
Pore Size Å:130
Base Deactivated:Yes
Base Material:Silica
Area (m2/g: 170
Carbon Loading(%):7
Endcapped: Yes
Particle Shape: Spherical
Phase Type
USP Lcode 7
pH Range 2-8
Material >20 µm No

LiChrospher RP-Select B,
Phase Name: C8
Pore Size (Å):60
Base Deact: Yes
Base Material: Silica
Surf. Area (m2/g): 700
Carbon Loading(%): 11.5
Endcapped: Yes
Particle Shape: Spherical
Phase Type: Monomeric
USP Lcode: 7
Lichrospher also known as Supersphere columns in Europe

I hope this helps.

Tim