3. Two mobile phases were evaluated to study the behavior of five dyes. The following data from each chromatogram were collected: Mobile Phase 1: Acetone/Water RF Mobile Phase 2: Ethanol/Water Distance traveled (cm) RF Distance traveled (cm) 4.7 4.9 Solvent front 0.62 0,ая 0.85 0.62 0.66 0.98 0.76 0.16 0.53 0.29 4.8 2.9 Green dye Red dye Yellow dye Blue dye Purple dye 3.7 1.3 0.8 4.0 2.6 2.9 1.4 3.1 a) Calculate the RF values for each dye for both chromatographic systems. Record these values in the table above. b) Explain your reasons for choosing which solvent would be most effective in separating the green from the blue dye. c) Which mobile phase system would be most effective for separating all 5 dyes? Explain.

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter33: High-performance Liquid Chromatography
Section: Chapter Questions
Problem 33.14QAP
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3. Two mobile phases were evaluated to study the behavior of five dyes. The following
data from each chromatogram were collected:
Mobile Phase 1: Acetone/Water
RF
Mobile Phase 2: Ethanol/Water
Distance
traveled (cm)
RF
Distance
traveled (cm)
4.7
4.9
Solvent front
0.62
0,ая
0.85
0.62
0.66
0.98
0.76
0.16
0.53
0.29
4.8
2.9
Green dye
Red dye
Yellow dye
Blue dye
Purple dye
3.7
1.3
0.8
4.0
2.6
2.9
1.4
3.1
a) Calculate the RF values for each dye for both chromatographic systems. Record these
values in the table above.
b) Explain your reasons for choosing which solvent would be most effective in
separating the green from the blue dye.
c) Which mobile phase system would be most effective for separating all 5 dyes? Explain.
Transcribed Image Text:3. Two mobile phases were evaluated to study the behavior of five dyes. The following data from each chromatogram were collected: Mobile Phase 1: Acetone/Water RF Mobile Phase 2: Ethanol/Water Distance traveled (cm) RF Distance traveled (cm) 4.7 4.9 Solvent front 0.62 0,ая 0.85 0.62 0.66 0.98 0.76 0.16 0.53 0.29 4.8 2.9 Green dye Red dye Yellow dye Blue dye Purple dye 3.7 1.3 0.8 4.0 2.6 2.9 1.4 3.1 a) Calculate the RF values for each dye for both chromatographic systems. Record these values in the table above. b) Explain your reasons for choosing which solvent would be most effective in separating the green from the blue dye. c) Which mobile phase system would be most effective for separating all 5 dyes? Explain.
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