18 Maintenance and Inspection
18.7
18.
299
GC-2010 Plus
18.7
Inspection and Maintenance: Capillary Column
NOTE For the details on removing the capillary column, refer to “4 Installing the column”.
18.7.1 Inspection/maintenance cycle
In the following situations, inspect and/or maintain the capillary column.
・ When using a new column or a column which has not been used for a long time
・ When ghost peaks are detected
・ When the baseline is unstable
・ When the baseline noise is high
18.7.2 Inspection/maintenance
Q Troubleshooting
Check whether the baseline is unstable or ghost peaks are present.
A contaminated column can cause an unstable baseline or ghost peaks. If these problems
occur, the column should be conditioned.
Q Preparing the gas chromatograph main body
If the system is operating, press the [SYSTEM] key and select [Stop GC] (PF menu). The
temperature of the injection port, the column oven and detector automatically decrease.
Press the [MONIT] key, and ensure that the temperature of the injection port, the detector
and the column are below 50 °C
Press the [FLOW] key, and select [Off] (PF menu). The inspection/maintenance can then
begin.
NOTE For the details on handling the capillary column, refer to “4 Installing the column”.
Q Conditioning the capillary column
Condition the capillary column using the following procedure.
(1) Setting the carrier gas
To condition the column, use the an aleysis flow rate. However, reduce the split ratio to
conserve carrier gas.
(2) Setting the column oven temperature
Set the column oven to a temperature approximately 30 °C higher than the column
operating temperature during analyses.
Do not exceed the maximum column temperature limit.
(3) Setting the injection port temperature and the detector temperature
Use the same temperatures normally set for analyses.
Set the detector to a temperature approximately 30 °C higher than the column operating
temperature.
WARNING
Risk of burns. Do not perform maintenance until the temperature of
the injection port, detecor, and oven have dropped below 50 °C