
Chapter 3 Preparing Samples
3-24 PerSeptive Biosystems
3
3.1.5.4 ZipTips
®
When to use
Use this technique for peptides, proteins, and oligonucleotides
when you know the sample contains salt, buffer, or glycerol
contaminants. This technique is faster, easier, and more
effective than dialysis for removing contaminants.
NOTE: This technique introduces organic solvent into the
sample, which is not compatible with thin layer sample
application. If you will apply sample using the thin layer
application technique, remove the organic from the sample
before loading sample on the plate. For more information,
see Section 3.2.3, Loading Samples
(Thin Layer Application).
Millipore ZipTips
®
can be used for a wide range of applications
and are compatible with digestion procedures. You can
expect 50 to 70 percent recovery using the following
procedure.
NOTE: ZipTips
can also be used for sample concentration
and fractionation of complex mixtures.
What you need
To clean samples with ZipTips you need:
• Micro-adsorptive C
18
pipette ZipTips
• Acetonitrile (ACN)
•TFA
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