How is it used in 21. Injection of ethane, propane, butane, pentane, hexane, hep- tane, and octane on a squalene column under isothermal conditions gives retention times of 3.51, 4.98, 7.30, 11.00, 16.85, 26.12, and 40.8 min, respectively. Air, which is nonre- tained, elutes at 1.00 min. An injection of benzene, butanol, nitropropane, pyridine, and 2-pentanone under the same conditions gives retention times of 20.00, 6.50, 4.10, 10.05, and 10.35 min. What are the Kováts retention indexes for benzene, butanol, nitropropane, pyridine, and 2-pentanone

How is it used in 21. Injection of ethane, propane, butane, pentane, hexane, hep- tane, and octane on a squalene column under isothermal conditions gives retention times of 3.51, 4.98, 7.30, 11.00, 16.85, 26.12, and 40.8 min, respectively. Air, which is nonre- tained, elutes at 1.00 min. An injection of benzene, butanol, nitropropane, pyridine, and 2-pentanone under the same conditions gives retention times of 20.00, 6.50, 4.10, 10.05, and 10.35 min. What are the Kováts retention indexes for benzene, butanol, nitropropane, pyridine, and 2-pentanone

Chemistry

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ISBN:9781305957404

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Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Question

How is it used in GC?
21. Injection of ethane, propane, butane, pentane, hexane, hep-
tane, and octane on a squalene column under isothermal
conditions gives retention times of 3.51, 4.98, 7.30, 11.00,
16.85, 26.12, and 40.8 min, respectively. Air, which is nonre-
tained, elutes at 1.00 min. An injection of benzene, butanol,
nitropropane, pyridine, and 2-pentanone under the same
conditions gives retention times of 20.00, 6.50, 4.10, 10.05,
and 10.35 min. What are the Kováts retention indexes for
benzene, butanol, nitropropane, pyridine, and 2-pentanone
under these conditions?
od under the same conditions as

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An aqueous solution of propanone (acetone, 1) of total volume 0.120 mL was analysed by quantitative 1H NMR, using the CH protons of (E)-butenedioic acid (fumaric acid, 2) to provide an internal standard. A stock solution of 2 with concentration = 10.00 x 10-3 mol L-1 was prepared by dissolving pure solid 2 in deuterium oxide (D2O). The solution of 1 was mixed with a 0.400 mL aliquot of the stock solution of 2 and the 400 MHz 1H NMR spectrum of the mixture was recorded (see Table 2 below).