Voyager DP-263-S Guia do Utilizador Página 143

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Preparing Samples
Voyager
Biospectrometry
Workstation User’s Guide 3-13
3
DHB for small
molecules
Matrix concentration 10 mg/ml
Final sample concentration Highly sample-dependent. Ideally a minimum of
10–200 pmol/µl (10–20 ng/µl).
With lower concentrations, it may be difficult to
distinguish sample signal from matrix signal.
Solvents Any solvent in which molecules are soluble
(deionized water to 100% methanol or acetone).
Preparation Follow the procedure in “Preparing matrix” on
page 3-5. Dry down quickly under vacuum for even
response. If you allow to air dry, you will see a less
even response during analysis.
Crystals Needle-like crystals arranged in a ring if air-dried
(see Figure 3-3 on page 3-35).
Stability Prepare weekly.
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