2. [1.5 pts] A certain compound was found to have a GC retention time of 6.5 min

Question

2. [1.5 pts] A certain compound was found to have a GC retention time of 6.5 minutes. Under otherwise identical conditions how would the use of a shorter GC column affected the compound’s GC retention time?

2. 1.5 pts] A certain compound was found to have a GC retention time of 6.5 minutes. Under otherwise identical conditions how would the use of a shorter GC column affected the compound's GC retention time? O The GC retention time would have been longer than 6.5 minutes The GC retention time would have been shorter than 6.5 minutes The GC retention time would have still been 6.5 minutes

Explanation / Answer

The GC retention time will be shorter than 6.5 minutes; this is because as the column length is shortened, the compounds in the mixture will have a shorter distance to travel. This means that the compounds will interact less with the column material and hence the retention time will be lowered. The resolution of the peaks will also be lowered as the peak will not be well-separated.

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