*26-14 The following data are for a liquid chromatographic column Length of packing Flow rate 24.7 cm 0.313 mL/min Vt Vs 1.37 mL 0.164 mL A chromatogram of a mixture of species A, B, C, and D provided the following data: Retention Width of Peak Time, min Base (W), min Nonretained 3.1 6.2 0.49 13.3 1.07 15.7 1.32 D 21.6 1.72 Calculate (a) the number of plates from each peak. (b) the mean and the standard deviation for N. (c) the plate height for the column. * 26-15 From the data in Problem 26-14, calculate for A, B, C, and D (a) the retention factor. (b) the distribution constant. * 26-16 From the data in Problem 26-14, calculate for species B and C (a) the resolution. (b) the selectivity factor a. (c) the length of column necessary to separate the two species with a resolution of 2.5. (d) the time required to separate the two species on the column in part (c).

26-14 The following data are for a liquid chromatographic column Length of packing Flow rate 24.7 cm 0.313 mL/min Vt Vs 1.37 mL 0.164 mL A chromatogram of a mixture of species A, B, C, and D provided the following data: Retention Width of Peak Time, min Base (W), min Nonretained 3.1 6.2 0.49 13.3 1.07 15.7 1.32 D 21.6 1.72 Calculate (a) the number of plates from each peak. (b) the mean and the standard deviation for N. (c) the plate height for the column. 26-15 From the data in Problem 26-14, calculate for A, B, C, and D (a) the retention factor. (b) the distribution constant. * 26-16 From the data in Problem 26-14, calculate for species B and C (a) the resolution. (b) the selectivity factor a. (c) the length of column necessary to separate the two species with a resolution of 2.5. (d) the time required to separate the two species on the column in part (c).

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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Question

26-14 The following data are for a liquid chromatographic column
Length of packing
Flow rate
24.7 cm
0.313 mL/min
VM
Vs
1.37 mL
0.164 ml.
A chromatogram of a mixture of species A, B, C, and D provided the following data:
Retention
Width of Peak
Time, min
Base (W), min
Nonretained
3.1
A.
6.2
0.49
13.3
1.07
C
15.7
1.32
D
21.6
1.72
Calculate
(a) the number of plates from each peak.
(b) the mean and the standard deviation for N.
(c) the plate height for the column.
* 26-15 From the data in Problem 26-14, calculate for A, B, C, and D
(a) the retention factor.
(b) the distribution constant.
* 26-16 From the data in Problem 26-14, calculate for species B and C
(a) the resolution.
(b) the selectivity factor a.
(c) the length of column necessary to separate the two species with a resolution of 2.5.
(d) the time required to separate the two species on the column in part (c).
I just need help on 15 and 16

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