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314 BD FACSAria II User’s Guide
Cytometer Quality Control Using BD FACSDiva
Software
Perform cytometer quality control (QC) to ensure consistent performance over
time. During cytometer QC, you want to keep as many variables as constant as
possible. For example, always use the same QC particle type and lot number,
sheath pressure, and PMT settings. If you work with different sheath pressures,
you might consider having a separate QC experiment for each pressure.
When the experiment, cytometer settings, and QC sample are constant, changes
in the recorded means and coefficients of variation (CVs) indicate changes in
cytometer performance over time. QC data should be analyzed for trends over
30–60 runs.
This section describes how to use a QC experiment template to verify laser delay
and area scaling values, and how to record parameter means and CVs for a
fluorescent bead. For examples of fluorescent particles that can be used for
cytometer QC, see Cytometer Setup Particles on page 267.
NOTE QC results are affected by laser and fluidics performance. We strongly
recommend following the laser and fluidics maintenance procedures in
Chapter 6.
Setting Up the Cytometer Configuration
The cytometer configuration includes these settings:
•Fluorochromes
•Filters and mirrors
Sheath pressure (must match sheath pressure in sort setup)
•Nozzle size
•Window extension
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