Gas chromatography FID flameout
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Capillary column, FID detector. H2: 30 mL/min; Air: 300 mL/min; Temperature: 250°C; Tail gas flow: 15 mL/min. The detector shuts down after operating for one or two days; the flow rates of all gas supplies are normal. Please help
Reduce the tail gas flow rate, and increase the air and hydrogen flow rates
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Increase the auxiliary air flow slightly, and also increase the hydrogen flow a bit; this may raise the signal baseline a little, but the flame will be more stable. Also check whether there is carbon buildup in the burner; if so, clean it according to the manual instructions.