Installation and Getting Started
2-36
D960R3
User’s Manual Probot
FIGURE 2-37 The Fractionation Application Wizard – Fraction Control Mode
The following modes are available:
•
Time
– The fractionation is controlled by time. The intervals are specified in
seconds and can be as low as 4 seconds. Time control is the most commonly
and safest control mode. This control mode allows also for fractionation by a
time table.
•
External
–Input signals control the fractionation (e.g. peak start and peak end).
A CHROMELEON program can be designed to generate to generate such
signals on the Ultimate Micropump while the UV signal is used for peak
detection. This allows for collecting of peaks only.
•
Manual
– This control mode requires input of the operator. The operator
determines by manual input (mouse) the when a peak starts or ends. This
requires that the operator monitors the entire chromatographic run and
provides the right signal with each peak.
Note: In time control mode the entire chromatogram is collected, e.g. all peaks
and ‘waste’. With external and manual control, the ‘waste’ can be discarded.
Make certain that the peak detection parameters are properly set to avoid the
possibility that peaks are treated as ‘waste’ in external control mode.
The next step is to specify the number of LC runs (injections) and to define in
which way the available sample carriers are used (e.g. one sample carrier per
injection or LC run). FIGURE 2-38 shows the three basic possibilities and which
option the appropriate is depending on the requirements:
•
One injection
- The LC run (‘sample’) is collected in one group. This group can
use all spots of all sample carriers.
•
Multiple injections, optimal use of spots
– Multiple LC runs are collected in one
large group. This group can use all spots of all sample carriers.
Содержание Probot 161403
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