Nonpolar aromatic compounds were separated by HPLC on an octadecyl(C18) bonded phase. The mobile phase was 65 vol% methanol in water. How would the retention times of these aromatic compounds be affected if 90 vol% methanol was used instead? The retention times will be longer in 90 vol% methanol. The retention times will double. The retention times will not change. The retention times will be shorter in 90 vol% methanol.

Nonpolar aromatic compounds were separated by HPLC on an octadecyl(C18) bonded phase. The mobile phase was 65 vol% methanol in water. How would the retention times of these aromatic compounds be affected if 90 vol% methanol was used instead? The retention times will be longer in 90 vol% methanol. The retention times will double. The retention times will not change. The retention times will be shorter in 90 vol% methanol.

Chemistry

10th Edition

ISBN:9781305957404

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

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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