5 Analysis
5.2 Notes for Analysis
65
GC-2014
Q Shutting down the GC
To shut down the system, select [Stop GC] (PF menu) on the [SYSTEM] key screen. Then,
the system stops temperature control after the period of time set as the stop time, flows the
carrier gas for the period of time set as the flow-off time, then stops.
When shutting down the GC, the temperature of each part should be decreased at first, then
the carrier gas should be stopped so that the column can be protected. It is convenient to
use the stop time and the flow-off time.
Do not turn off the power, before select [Stop GC] (PF menu).
When shutting down the GC, the heated zones are cooled, and then the carrier gas flow is
turned off. To accomplish these in the correct sequence automatically, use a stop time (this
stops temperature control at the set time) and flow off time (turns off carrier gas flow at the
set time). Do not turn off the GC without first selecting [Stop GC] (PF menu).
Q Obtaining reproducible analysis results
Follow these suggestions to obtain reproducible results:
・ Using an AOC-20i auto injector is suggested in order to inject a sample to obtain highly
reproducible results.
・ Do not increase the temperatures of unused injection ports.
・ The GC is designed to perform optimally at room temperatures of 18-28 °C. Room tem-
peratures above 28 °C will negatively inpact reproducibility.
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