No, we only offer the pre-column, Cogent Column Filters in the following pore sizes: • 2um stainless steel mesh: Catalog Number 49650-020 • 0.5um stainless steel mesh: Catalog Number 49650-005 HPLC Column Protection
Category: Cogent Column Filters – FAQ
This is for the inline or in line PEEK filters that are designed to protect HPLC columns of all brands from unwanted particuatles.
Can I change the filter element in the Cogent Column Filters? – FAQ
No, there is no need to replace the stainless steel filter element (frit) in the pre-column, Cogent Column Filters. When the unit is ready to replaced, simply dispose of it. The device will be destroyed if you open it. Click here to view more information about pre-column filters for HPLC
Can the Cogent Column Filters replace my HPLC guard columns? – FAQ
No, a guard column is both a particulate filter (non dissolved chemicals) and a chemical filter (removes dissolved chemicals). The Cogent Column Filter is a particulate filter and adds extra protection for your expensive analytical and guard columns Click HERE for Column Protection Ordering Information
Do I need any special fittings to use the Cogent Column Filter with my current HPLC Column? – FAQ
No, the pre-column, Cogent Column Filter is completely compatible with all 1/16th”, 10-32 internal fitting ports. Most modern brands of HPLC Columns are fully compatible. Finger tighten the filters right into the inlet side of the guard or analytical column (universal fit) and a finger tight male nut to hold your stainless or PEEK tubing […]
Is the Cogent Column Filter compatible with a 2.1mm ID Column? – FAQ
The Cogent Column Filter is compatible with any stationary phase in any HPLC Column. The Cogent brand of in line, column filters are stainless steel (SS) frits encased in PEEK holders that traps unwanted particles before they get trapped in the frits of HPLC columns. When back pressure begins to build up, these column filters […]
Should I filter my HPLC Solvents and Buffers before use? – FAQ
The most common cause of excessive back pressure is due to the accumulation of particulates and or permanently adsorbed materials at the top of the HPLC Column. This could be precipitate or un-dissolved particles which can come from your samples or your mobile phase or shredded pieces of pump seals. The best way to minimize […]
What is the maximum pressure the Cogent Column Filters should be used with? – FAQ
The pre-column, Cogent Column Filters can be safely used with a maximum pressure of 5,000 psi. Click here to view more information about pre-column filters for HPLC
What is the thickness of the SS filter element in the Cogent Column Filters? – FAQ
The stainless steel filter element or “screen” is approximately 0.039″ thick in the pre-column, Cogent Column Filters. Click here to view more information about pre-column filters for HPLC
What materials are the Cogent Column Filters manufactured with? – FAQ
The device (body) is make from high purity, inert PEEK with an internal stainless steel filter element and these are the only materials in the pre-column, Cogent Column Filters. Click here to view more information about pre-column filters for HPLC
Which solvents should not be used with the Cogent Column Filters? – FAQ
All solvents that are NOT compatible with PEEK should not be used with the pre-column, Cogent Column Filters. They include but not limited to: DMSO, Methylene Chloride and concentrated THF. Click here to view more information about pre-column filters for HPLC
Will the Cogent Column Filters change my current HPLC results? – FAQ
No, the pre-column, Cogent Column Filters will have no effect on your chromatography if your analytes are compatible with PEEK and stainless steel. It will simply protect the column from dust, non-dissolved salts, pump seal particles or dirt that passes from the HPLC pump into a column. Click here to view more information about pre-column […]