Agilent Technologies 7000 Triple Quadrupole GC/MS, Maintenance Manual

Page: 146 / 214

146 Troubleshooting and Maintenance Manual
7
Analyzers and Collision Cell
Overview
The complete analyzer system is shown in Figure 26 .
The front analyzer
The front analyzer consists of the ion source, the front quadrupole,
heaters/sensors, and the post-filter.
The sample components exiting the GC column flow into the ion source. In the
ion source, the sample molecules are ionized and fragmented. The resulting
ions are repelled from the ion source into the front quadrupole mass filter. The
selected ions pass through the filter, and post-filter, and enter the collision
cell.
The post-filter
This device, located on the end of the front quadrupole, helps transfer the
selected ions to the collision cell. It also aligns the front of the collision cell
with the front analyzer.
Figure 26 The analyzer system
Front analyzer (MS1) Post-filter Collision cell Pre-filter Rear analyzer (MS2) Detector