Injection of butane and hexane on a squalene column under isothermal conditions gives retention times of 4.98 and 16.85, respectively. Air, which is nonretained, elutes at 1.00 min. An injection of butanol under the same conditions gives retention times of 6.50 min. What is the Kováts retention Index for butanol under these conditions?

A gas chromatography column was operated under the following conditions:

Column dimension: 1.1 M length x 2.0 mm internal diameter Retention times: Nonretained carrier gas, tm = 0.30 min Compound A retention time, trA = 1.98 min Compound B retetntion time trb = 4.16 min Compound C retention time, trc = 7.93 min Peak widths at base : 0.18, 0.41, 0.82 min for A, B, and C respectively.

Calculate: i) the retention factor, k” for each compound ii) the selectivity factor, α for each adjacent pair of compounds iii)

A certain compound was found to have a GC retention time of 9.6 minutes. Under otherwise identical conditions how would the use of a slower Helium flow rate have affected the compound’s GC retention time?