2 Before Use
2.1 Setting Analytical Flow Lines
18
GC-2014
Q Analytical flow lines
An analytical flow line consists of the flow
controller, injection port, column, detector cell,
and detector amp as shown in Fig. 2.1.1.
During analysis, the flow controller feeds
carrier gas to the injection port, a sample
injected to the injection port goes through the
column to reach to the detector cell, and a
detected signal is amplified by the detector
amp to be outputted.
In order to allow the gas chromatograph to
recognize these units as an analytical flow line,
specification for the connection between them
is necessary.
For regular analysis, specify the combination
between an injection port and detector to
which a column is connected. (Refer to the
following page for setting procedures.)
Connections of the flow controller(s) and injection
port(s) and connections of detector cell(s), and
detector amplifier(s) are specified by a serviceperson
at shipment or installation. They do not need to be
specified for regular analysis.
Fig. 2.1.2 shows a representative example of
the line configuration for packed column FID
analysis using the GC-2014.
In this example, the dual INJ and dual FID are
connected with two columns and the difference
between two FID signals is outputted from the
dual FID amp. Two columns are used because
the dual INJ and dual FID are recognized as a
single unit respectively. However, this is
considered to be a single line.
Outputted Signal
Column
Injection
port
flow
comtrol
Detector
amp
Detector
cell
Fig. 2.1.1 Concept of
analytical flow lines
NOTE
Column(L) Column(R)
L
(L) (R)
Dual INJ
R
L R
Dual AFC
Dual FID
amp
Dual FID
Outputted Signal
Fig. 2.1.2 An example of
analytical flow lines
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