Reprosil-Pur columns exist of porous spherical silica gel with a range of 1.9 – 50um in particle size and 60 – 1000A in pore size. With a purity of 99,999% ideal for pharmaceutical and biochemical LC-MS separations of all kind of samples. The Reprosil Gold series are bio-ultra pure RP phases that are extremely stable due to bidentate endcapping. They are used for the separation of peptides, proteins and pharmaceutical components. Partnumber R10.9G.S2510 for the ReproSil Gold 120 C18, 10 um 250 x 10 mm.