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I have 2 questions on columns used in the Gas Chromatography-Flame Ionisation Detector (GC-FID) instrument: -

1) If a capillary column is left in the GC-FID instrument for 2 months with the instrument switched off (i.e. instrument is not in use),will this affect the performance the column?
Is it necessary to keep the capillary column immediately if it is not in use?

2) If a compound can be analysed using both capillary & packed columns, which is the preferred column?

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