Voyager DP-263-S Guía de usuario Pagina 295

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Optimizing Instrument Settings Parameters
Voyager
Biospectrometry
Workstation User’s Guide 5-65
5
5.4.3.2 Acceptable Resolution in
Delayed Extraction Mode
Isotope resolution
You should be able to partially resolve isotopes up to the
following masses:
Linear mode— ~2,000 Da
Reflector mode— ~6,000 Da
Guidelines for
acceptable
resolution
Acceptable resolution is determined by the mass range you
are analyzing. Refer to the following tables for the typical
resolution at a given signal-to-noise ratio for different mass
ranges:
Mass Range Typical Resolution* in Linear Mode
Signal-to-Noise
Ratio**
1,000–2,000 2,000 or greater 50:1 or greater
2,000–20,000 Determined by width of isotopic envelope 50:1 or greater
>20,000 Sample-dependent 20:1 or greater
* On Voyager-DE STR models, resolution is approximately 30 percent higher than the values listed.
** Required signal-to-noise ratio to obtain the resolution stated.
Mass Range Typical Resolution* in Reflector Mode
Signal-to-Noise
Ratio**
500–1,500 5,000 or greater 50:1 or greater
1,500–6,000 7,000 or greater 50:1 or greater
6,000–15,000 Determined by width of isotopic envelope 20:1 or greater
>15,000 Sample-dependent 20:1 or greater
* On Voyager-DE STR models, resolution is approximately 30 percent higher than the values listed.
** Required signal-to-noise ratio to obtain the resolution stated.
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