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can you help me ?
Posted: Wed Apr 20, 2005 2:30 pm
by zhengmin
Hello,everyone:
I want tu buy a HPLC column, it is C18, 4*125mm, 4um. can you tell me where I can buy it? thank you.
Posted: Wed Apr 20, 2005 3:12 pm
by DR
I suspect that finding those exact dimensions will prove difficult. There are lots of 3.5µ packings available in 4.6x150mm columns... Waters has 3.9x150mm columns, but I'm not sure if there are 3.5 or 4µ packings available for them. Check
www.waters.com,
www.phenomenex.com,
www.varian.com (Zorbax & Metachem columns)... There are many others.
Posted: Wed Apr 20, 2005 8:43 pm
by Uwe Neue
12.5 mm x 4 mm looks German. Check at Merck, Macherey-Nagel or Bischoff.
Posted: Thu Apr 21, 2005 12:53 am
by Kostas Petritis
Uwe is correct,
I have worked in the past with Merck columns with that dimensions. The packing material was Purospher RP-18e.
Posted: Thu Apr 21, 2005 12:25 pm
by zhengmin
thanks of all
I will look for it.
Posted: Thu Apr 21, 2005 2:36 pm
by bartjoosen
Uwe,
I guess you forgot something:
Novapack C18 has 4µm particles!
Posted: Thu Apr 21, 2005 8:41 pm
by Uwe Neue
Bart, you are correct, but the column dimension does not look like anything that we have in our standard program. It can be custom packed though...
Posted: Mon Apr 25, 2005 7:21 am
by Alex Buske
125x4 mm are sort of standard in Germany. You would get this dimensions from all of the german manufacturers and refillers. 4µm material is less common: Merck has the supersphere, there is another 4µm, 80 A material and maybe some old brands.
Alex