Topsil Columns

Topsil is Welch’s Next Generation Silica, with larger pore size and greater surface area, distinguishing Topsil stationary phases from those in our Ultisil Series.

High purity silica (99.99%) with 150Å pore size and 250m2/g surface area.
Good for small molecules and peptides.
Lower back pressure than Ultisil.

Topsil CN, Cartridge: 5µm, 150Å, 2.1×10mm, 2pcs

$56.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil CN, Cartridge: 5µm, 150Å, 4.6×10mm, 2pcs

$62.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil NH2, Cartridge: 3µm, 150Å, 2.1×10mm, 2pcs

$96.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil NH2, Cartridge: 5µm, 150Å, 2.1×10mm, 2pcs

$56.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil NH2, Cartridge: 3µm, 150Å, 4.6×10mm, 2pcs

$100.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil NH2, Cartridge: 5µm, 150Å, 4.6×10mm, 2pcs

$62.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil Silica, Cartridge: 5µm, 150Å, 2.1×10mm, 2pcs

$56.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil Silica, Cartridge: 5µm, 150Å, 4.6×10mm, 2pcs

$62.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil Phenyl-Hexyl, Semi-Prep Cartridge: 5µm, 150Å, 10×10mm

$169.00 USD

Welch preparative guard column cartridges use the same packing as the preparative column, which can intercept some of the same polar substances in the sample and prevent them from contaminating and...

Topsil Phenyl-Hexyl, Prep Cartridge: 5µm, 150Å, 30×10mm

$452.00 USD

$3,100.00 USD

Welch preparative column uses the same packing materials as does analytical column, to ensure the best reproducibility of analysis and preparative scale. Special packing technique and stainless mod...

$3,100.00 USD

$1,330.00 USD

$480.00 USD

Topsil series HPLC column is a next-generation column introduced by Welch, besides Ultisil, Xtimate and Welchrom, this series use different silica and provide different selectivity.

$500.00 USD

Topsil series HPLC column is a next-generation column introduced by Welch, besides Ultisil, Xtimate and Welchrom, this series use different silica and provide different selectivity.

Topsil HILIC NH2, Cartridge: 3µm, 150Å, 2.1×10mm, 2pcs

$96.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil HILIC NH2, Cartridge: 5µm, 150Å, 2.1×10mm, 2pcs

$56.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil HILIC NH2, Cartridge: 3µm, 150Å, 4.6×10mm, 2pcs

$100.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

Topsil HILIC NH2, Cartridge: 5µm, 150Å, 4.6×10mm, 2pcs

$62.00 USD

Welch guard cartridges use the same packing materials as the analytical column to ensure the best analysis results. When HPLC column ID<4.0mm, it is recommended to use a 2.1×10mm cartridge, whil...

$470.00 USD

Topsil C8 offers distinct selectivity compared to other C8 columns from Welch Materials. With lower column pressure and higher efficiency, it is an economical HPLC column choice.

$400.00 USD

Topsil CN offers distinct selectivity compared to other cyano columns from Welch Materials. With lower column pressure and higher efficiency, it is an economical HPLC column choice.

$400.00 USD

Topsil NH2 offers distinct selectivity compared to other amino columns from Welch Materials. It is suitable for monosaccharide separation under reversed-phase conditions and polar compound separati...