Gas Chromatography
Split injection is carried out by

splitting off some of the sample so that it does not enter the column
None of these
splitting the sample into smaller portions to inject at the same time through parallel ports
splitting the sample into smaller portions to inject sequentially

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Gas Chromatography
Column bleeding occurs when

the column is cracked and stationary phase leaks out
the column breaks during installation and causes personal injury
elution of the analyte is extended over time
traces of the stationary phase are eluted

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