Transcription of What is Septum Bleed? - Superchrom
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What is Septum Bleed? - Superchrom
CLeptum bleed can be the source of problems when analyzing samples by capillary gas chromatog-raphy. It occurs when volatile compounds, such as monomers or additives, are emitted from theu Septum . Septum bleed is amplified with capillary gas chromatography because capillary col-umns have higher efficiency and operate at much lower flow rates than packed columns. There aremany variables that affect the amount of Septum bleed during sample analysis (such as inlet tempera-ture, initial hold time, compression, etc.).Most of these variables can be controlled by the analyst. Thesingle most important variable in minimizing Septum bleed is the quality of the septa you are using. Ahigh quality, low- bleed Septum greatly reduces the need to adjust these GC is Septum Bleed? Septum bleed occurs when volatile compounds are emittedfrom the Septum . It is exhibited during a temperatureprogrammed run by either a baseline rise and/or extraneouspeaks not associated with the sample or the bleed is most noticeable during a temperatureprogrammed run because the volatiles emitted from theseptum collect on the head of the column during the cooldown period and the initial hold time.
Lc eptum bleed can be the source of problems when analyzing samples by capillary gas chromatog- raphy. It occurs when volatile compounds, such as monomers or additives, are emitted from the u septum. Septum bleed is amplified with capillary gas chromatography because capillary col-
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