
Chapter 3 Preparing Samples
3-6 PerSeptive Biosystems
3
5. Cap the tube and vortex thoroughly for approximately
1 minute or until dissolved. You can shake the tube by
hand if you do not have a vortex mixer.
6. Microcentrifuge the tube for 30 seconds at
2,000 to 5,000 rpm. Alternatively, allow the solution to
settle for about 10 minutes. You may see a precipitate at
the bottom of the tube.
When applying matrix, use the supernatant, not the
precipitate.
3.1.3 Matrix Information
Refer to the tables on the following pages to determine the
requirements for the matrix you are using. This section
includes information for:
• Sinapinic acid
•
α
-cyano-4-hydroxycinnamic acid (CHCA)
•THAP
•3-HPA
• DHB
• DHBs
• Synthetic polymer matrices
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