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Precolumn filters are essential for protecting HPLC columns against particulate matter which can accumulate on the column frit, leading to split peaks and high backpressure. Sources of particles include mobile phases (especially when buffers are mixed with organic solvents), leaking pump and injector seals, and samples. Precolumn filters are also useful because changing the column frit is extremely difficult to do without disturbing the column packing, whereas changing the precolumn filter’s frit is easy, providing relatively inexpensive insurance against column damage.
Precolumn filters, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
These filters are ideal for higher pressure applications and to help prevent particulate contamination.
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Frits, titanium, Unidense type
Supplier: VICI JOUR RESEARCH
Titanium frits are preferred over stainless steel frits for the application related to the analysis of sensitive substances such as biomolecules.
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Stainless steel semi-prep frits, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
Upchurch Scientific®, A-337 semi-prep frit, Porozita: 20,0 µm, Tloušťka: 1,6 mm, Vně. Ø frity: 19,1 mm, Objem frity: 152 µl, Materiál frity: Nerezová ocel, Vně. Ø kroužků: 22,4 mm, Materiál kroužku: ETFE
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Filters, Frit-In-A-Ferrule™, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
These filters are designed to seal and filter simultaneously by incorporating a frit into the body of a flat-bottom ferrule.