Final answer:
Slow injection of a large sample volume in gas chromatography can result in shorter retention times and reduced sensitivity, but does not affect separation efficiency and resolution.
Step-by-step explanation:
Gas chromatography separates components of a sample by their different affinities to the stationary and mobile phases. When a large sample volume is injected slowly, it can result in shorter retention times and reduced sensitivity, but it does not affect separation efficiency and resolution.