
Acquiring Spectra from the Sequence Control Panel
Voyager
™
Biospectrometry
™
Workstation User’s Guide 6-83
6
6.7.7.2 Calibration Standard Requirements
Mass calibration
standards
The requirements for mass calibration standards are
determined by your application. The following are general
guidelines:
• Mass calibrate on the same sample plate you will use to
analyze samples.
• For rapid screening in which high mass accuracy is not
needed, one calibration standard located in the center of
the plate is adequate.
• For applications requiring higher mass accuracy, more
calibration standards are needed. You must experiment
to determine the number and location of standards
required to provide the mass accuracy you require.
• For optimum mass accuracy, place samples in sample
positions adjacent to standards.
• For maximum mass accuracy, spot sample and standard
as close to each other as possible (within 1 mm). This is
referred to as close external calibration. For more
information, see Section 6.7.7.3, Performing Close
External Calibration.
6.7.7.3 Performing Close External Calibration
Overview
You have two options for close external calibration:
• Sample and standard in separate sample positions
• Sample and standard in the same sample position
NOTE: The closer the proximity of sample and standard,
the better the mass accuracy.
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