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Unformatted text preview: hydrocarbons, which is not CF 4 . A2. The best detector to couple with a gas chromatography would be the electron capture detector. Since the Photoionization Detector has a detection limit from 25 pg to 50 pg, electron capture can make up for the range below 25 pg for it can go as low as 5 fg/ s. 23-6. The thermal conductivity detector does not detect the carrier gas because it uses the gas as the reference. The flame ionization detectors signal is proportional to the number of susceptible carbon atoms, and only about 1 in 100,000 carbon atoms produce an ion. 23-10. 23-11. Problem B: The K value for SE-30 should be very small for the stationary phase has little attraction to the solute. The K value for Carbowax 20M should be very big for the stationary phase will attract the solute a lot....
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- Fall '11