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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.

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Precolumn MicroFilters, Upchurch Scientific®

Supplier: UPCHURCH SCIENTIFIC

Precolumn MicroFilters are specifically designed to directly connect into microbore or analytical columns.

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Frits, stainless steel, Unidense type

Supplier: VICI JOUR RESEARCH

Frits made of stainless steel with extra-low carbon content.

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Precolumn filters, high pressure

Supplier: VICI JOUR RESEARCH

Precolumn filter kit has a standard 10 to 32 fitting and fits direct to most column types without introducing an additional dead volume.

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Stainless steel frits

Supplier: UPCHURCH SCIENTIFIC

Upchurch Scientific®, A-418 frit, Porozita: 0,5 µm, Tloušťka: 1,57 mm, Vně. Ø frity: 1,6 mm, Objem frity: 0,6 µl, Materiál frity: Nerezová ocel, Vně. Ø kroužků: 5,08 mm, Materiál kroužku: PCTFE