Agilent Technologies 990 User Manual

2 Instrument Overview
Principle of Operation
16 Agilent 990 Micro GC User Manual
Principle of Operation
The Agilent 990 Micro GC can be equipped with one or two independent column channels. Each
column channel is a complete, miniaturized GC with dynamic electronic gas control,
micro-machined injector, narrow-bore analytical column, and micro thermal conductivity detector
(µ TCD), Figure 1.
Each Agilent 990 Micro GC cabinet has two analytical channel slots. Two cabinets can be
combined to support four analytical channels simultaneously. For a three or four channel
configuration, a channel extension cabinet can be connected to the Micro GC.
The Agilent 990 Micro GC analytical channels can optionally be equipped with a backflush option.
The advantages include the protection of the stationary column phase against moisture and
carbon dioxide. Also, the backflush option results in shorter analysis times as late elution
compounds, which are not of interest, do not enter the analytical column.
Figure 1. Agilent 990 Micro GC setup
Micro-machined
injector
Narrow-bore
analytical column
Micro thermal
conductivity
detector
Dynamic
electronic gas
control
One to four
independently
controlled
micro-machined
GC channels

Agilent Technologies 990 Specifications

General

Brand	Agilent Technologies
Model	990
Category	Laboratory Equipment
Language	English