
232
Generally, Method Segment 1 is a Filament/Multiplier Delay. This segment will
be acquired with the filament and multiplier turned off to protect the instrument
until after the elution of the solvent peak. The delay time can be set to 650
minutes, although 150 minutes is the recommended maximum. The Ionization
Mode is None. If a Filament/Delay segment is not needed, Delete the row.
Select the Method Segment 2 Segment Description to enter purpose of
segment. Click or tab to Start Time (min.) and enter time to start segment and
tab to End Time to enter end time. The segment time may be set to any value
from 0.10 to 650.00 minutes.
Click or tab to Low Mass to enter low mass for acquisition and tab to High Mass
to enter high mass value. The mass range can be set to any value from 10 to
650 m/z.
Tab to Ionization Mode. Click on the arrow and select the type of ionization to
be done in this segment. Details of each ionization mode are given in the Method
Editor.
Tab to Ion Preparation. Click on the arrow and select the option to be used in
the segment. The None selection will acquire regular EI or CI spectra. Details of
each option are given in the Method Editor
Multisegment Chromatogram Time Gaps
In a single acquisition it is possible to acquire data in different Ion Modes (EI/CI -
Auto/Fixed) and/or using different Ion Preparation techniques. When multiple
segments have been acquired, MultiChro displays each segment independently
in the Chromatogram display. There will be no connection between the last point
in one segment and the first point of the next segment. There is a small time gap
between segments. This gap is usually 1.0 0.2 seconds for all acquisition
modes except Automated Method Development (AMD) for MS/MS method
development. Using 10-segment AMD, the break between segments is about 1.5
seconds.
Comentarios a estos manuales