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Catalog #Particle SizeLengthIDModificationUnits
Catalog #
917835B
Particle Size
3 μm
Length
50 mm
ID
0.3 mm
Modification
Capillary Column
Units
ea.
Catalog #
917836B
Particle Size
3 μm
Length
150 mm
ID
0.3 mm
Modification
Capillary Column
Units
ea.
Catalog #
9178332
Particle Size
3 μm
Length
30 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
9178352
Particle Size
3 μm
Length
50 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
9178312
Particle Size
3 μm
Length
100 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
9178362
Particle Size
3 μm
Length
150 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
917833E
Particle Size
3 μm
Length
30 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
917835E
Particle Size
3 μm
Length
50 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
917831E
Particle Size
3 μm
Length
100 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
917836E
Particle Size
3 μm
Length
150 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
9178335
Particle Size
3 μm
Length
30 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178355
Particle Size
3 μm
Length
50 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178315
Particle Size
3 μm
Length
100 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178365
Particle Size
3 μm
Length
150 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178532
Particle Size
5 μm
Length
30 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
9178552
Particle Size
5 μm
Length
50 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
9178512
Particle Size
5 μm
Length
100 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
9178562
Particle Size
5 μm
Length
150 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
9178522
Particle Size
5 μm
Length
200 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
9178572
Particle Size
5 μm
Length
250 mm
ID
2.1 mm
Modification
Units
ea.
Catalog #
917853E
Particle Size
5 μm
Length
30 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
917855E
Particle Size
5 μm
Length
50 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
917851E
Particle Size
5 μm
Length
100 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
917856E
Particle Size
5 μm
Length
150 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
917852E
Particle Size
5 μm
Length
200 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
917857E
Particle Size
5 μm
Length
250 mm
ID
3.0 mm
Modification
Units
ea.
Catalog #
9178535
Particle Size
5 μm
Length
30 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178555
Particle Size
5 μm
Length
50 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178515
Particle Size
5 μm
Length
100 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178565
Particle Size
5 μm
Length
150 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178525
Particle Size
5 μm
Length
200 mm
ID
4.6 mm
Modification
Units
ea.
Catalog #
9178575
Particle Size
5 μm
Length
250 mm
ID
4.6 mm
Modification
Units
ea.
Chromatogram
Compounds
Description
Specifications
Tech Tips

Avoiding Chain Collapse

Moderate to very weak, polar solutes may require high aqueous mobile phases in order to achieve retention on C18 phases. Unfortunately, most C18 packings experience chain collapse under these conditions. This is chromatographically manifested as a partial or complete loss of retention, with analytes eluting at or close to the solvent front. To avoid this, choose the collapse-immune Ultra Aqueous C18 phase, or alternative packings that are resistant to chain folding, such as Ultra IBD.

Application-dedicated HPLC columns have longer lifetimes

Prolong the useful lifetimes of your HPLC columns by dedicating specific columns to specific applications, like analysts who use ion pair reagents often do. Sample components, mobile phase conditions, etc. can cause changes within a column, and sometimes effects of these changes are negligible until the column is used in another application. Although this practice can involve using more columns at one time, and calls for careful bookkeeping, longer lifetimes for individual columns can amount to significant savings.

Avoid the Void Volume

A speedy analysis is important, but avoid the temptation to elute important sample components near the void volume of your column. When you ignore this guideline, you are locked into using the mobile phase as the sample solvent; any admixing of sample solvent and mobile phase causes a baseline disturbance that makes quantification highly unreliable. Also, it is highly likely that the peak at the void volume will soar off-scale. You will avoid these and other potential problems by adjusting conditions such that the first target compound elutes with a capacity factor (k′) of at least 2.0.
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