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Select a Product
catalog #Product Namesizeunits
910750212
Ultra Amino Guard Cartridge
10 x 2.1mm
3-pk.
910750210
Ultra Amino Guard Cartridge
10 x 4.0mm
3-pk.
910750222
Ultra Amino Guard Cartridge
20 x 2.1mm
2-pk.
910750220
Ultra Amino Guard Cartridge
20 x 4.0mm
2-pk.
917850212
Ultra Aqueous C18 Guard Cartridge
10 x 2.1mm
3-pk.
917850210
Ultra Aqueous C18 Guard Cartridge
10 x 4.0mm
3-pk.
917850222
Ultra Aqueous C18 Guard Cartridge
20 x 2.1mm
2-pk.
917850220
Ultra Aqueous C18 Guard Cartridge
20 x 4.0mm
2-pk.
912750212
Ultra Aromax Guard Cartridge
10 x 2.1mm
3-pk.
912750210
Ultra Aromax Guard Cartridge
10 x 4.0mm
3-pk.
912750222
Ultra Aromax Guard Cartridge
20 x 2.1mm
2-pk.
912750220
Ultra Aromax Guard Cartridge
20 x 4.0mm
2-pk.
910950212
Ultra Biphenyl Guard Cartridge
10 x 2.1mm
3-pk.
910950210
Ultra Biphenyl Guard Cartridge
10 x 4.0mm
3-pk.
910950222
Ultra Biphenyl Guard Cartridge
20 x 2.1mm
2-pk.
910950220
Ultra Biphenyl Guard Cartridge
20 x 4.0mm
2-pk.
910150212
Ultra C1 Guard Cartridge
10 x 2.1mm
3-pk.
910150210
Ultra C1 Guard Cartridge
10 x 4.0mm
3-pk.
910150222
Ultra C1 Guard Cartridge
20 x 2.1mm
2-pk.
910150220
Ultra C1 Guard Cartridge
20 x 4.0mm
2-pk.
910250212
Ultra C4 Guard Cartridge
10 x 2.1mm
3-pk.
910250210
Ultra C4 Guard Cartridge
10 x 4.0mm
3-pk.
910250222
Ultra C4 Guard Cartridge
20 x 2.1mm
2-pk.
910250220
Ultra C4 Guard Cartridge
20 x 4.0mm
2-pk.
910350212
Ultra C8 Guard Cartridge
10 x 2.1mm
3-pk.
910350210
Ultra C8 Guard Cartridge
10 x 4.0mm
3-pk.
910350222
Ultra C8 Guard Cartridge
20 x 2.1mm
2-pk.
910350220
Ultra C8 Guard Cartridge
20 x 4.0mm
2-pk.
917450212
Ultra C18 Guard Cartridge
10 x 2.1mm
3-pk.
917450210
Ultra C18 Guard Cartridge
10 x 4.0mm
3-pk.
917450222
Ultra C18 Guard Cartridge
20 x 2.1mm
2-pk.
917450220
Ultra C18 Guard Cartridge
20 x 4.0mm
2-pk.
917750212
Ultra Carbamate Guard Cartridge
10 x 2.1mm
3-pk.
917750210
Ultra Carbamate Guard Cartridge
10 x 4.0mm
3-pk.
917750222
Ultra Carbamate Guard Cartridge
20 x 2.1mm
2-pk.
917750220
Ultra Carbamate Guard Cartridge
20 x 4.0mm
2-pk.
910650212
Ultra Cyano Guard Cartridge
10 x 2.1mm
3-pk.
910650210
Ultra Cyano Guard Cartridge
10 x 4.0mm
3-pk.
910650222
Ultra Cyano Guard Cartridge
20 x 2.1mm
2-pk.
910650220
Ultra Cyano Guard Cartridge
20 x 4.0mm
2-pk.
917550212
Ultra IBD Guard Cartridge
10 x 2.1mm
3-pk.
917550210
Ultra IBD Guard Cartridge
10 x 4.0mm
3-pk.
917550222
Ultra IBD Guard Cartridge
20 x 2.1mm
2-pk.
917550220
Ultra IBD Guard Cartridge
20 x 4.0mm
2-pk.
917950212
Ultra PFP Propyl Guard Cartridge
10 x 2.1mm
3-pk.
917950210
Ultra PFP Propyl Guard Cartridge
10 x 4.0mm
3-pk.
917950222
Ultra PFP Propyl Guard Cartridge
20 x 2.1mm
2-pk.
917950220
Ultra PFP Propyl Guard Cartridge
20 x 4.0mm
2-pk.
910050212
Ultra Silica Guard Cartridge
10 x 2.1mm
3-pk.
910050210
Ultra Silica Guard Cartridge
10 x 4.0mm
3-pk.
910050222
Ultra Silica Guard Cartridge
20 x 2.1mm
2-pk.
910050220
Ultra Silica Guard Cartridge
20 x 4.0mm
2-pk.
918150212
Ultra Quat Guard Cartridge
10 x 2.1mm
3-pk.
918150210
Ultra Quat Guard Cartridge
10 x 4.0mm
3-pk.
918150222
Ultra Quat Guard Cartridge
20 x 2.1mm
2-pk.
918150220
Ultra Quat Guard Cartridge
20 x 4.0mm
2-pk.

Managing High Backpressure

High backpressure is one of the most common problems encountered in HPLC analyses. Normal column backpressure is observed after a new column has been installed and equilibrated with mobile phase. Unfortunately, this pressure often will increase as the column is used because particles collect on the column inlet frit. These particles can be sample impurities, mobile phase contaminants, or materials from the injector or autosampler rotor seal. In addition to increasing backpressure, particles on the frit can cause split peaks, peak tailing, and, eventually, over-pressure shut-down. In some circumstances, these problems can be corrected by back-flushing the column. However, in many cases the result is an unusable column. To minimize backpressure problems, all samples and mobile phase solvents must be filtered before use, and rotor seals should be changed on a routine basis. Along with these preventive measures, it is advisable to use precolumn filters such as the Trident guard column protection system. Particles build up on the inexpensive, replaceable frit in the filter, instead of on the permanent frit at the column inlet.