Two solutes are separated on a column. Solute A has a shorter retention time than Solute...
Two solutes are separated on a column. Solute A has a shorter retention time than Solute B. Explain the relative attraction of Solutes A & B to the mobile and stationary phases.
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Two solutes are separated on a column. Solute A has a shorter
retention time than Solute...
A solvent passes through a chromatography column in 2.85 min, but the solute requires 9.43 min....
A solvent passes through a chromatography column in 2.85 min, but the solute requires 9.43 min. What is the retention factor, k?k= What fraction of the time does the solute spend in the mobile phase in the column? tfraction in mobile phase= The volume of the stationary phase is 0.115 times the volume of the mobile phase in the column (Vs=0.115Vm). What is the partition coefficient, K, for this system? K=
A solvent passes through a chromatography column in 2.18 min, but the solute requires 8.45 min....
A solvent passes through a chromatography column in 2.18 min, but the solute requires 8.45 min. What is the retention factor, k? k= What fraction of the time does the solute spend in the mobile phase in the column? I fraction in mobile phase = The volume of the stationary phase is 0.102 times the volume of the mobile phase in the column (Vs = 0.102Vm). What is the partition coefficient, K, for this system? K=
A solvent passes through a chromatography column in 3.41 min, but the solute requires 9.13 min. What is the retenti...
A solvent passes through a chromatography column in 3.41 min, but the solute requires 9.13 min. What is the retention factor, k? k= What fraction of the time does the solute spend in the mobile phase in the column? fraction in mobile phase The volume of the stationary phase is 0.101 times the volume of the mobile phase in the column (V = 0.101V.). What is the partition coefficient, K, for this system?
A solute with a retention time of 407s has a width at the base of 13.0s...
A solute with a retention time of 407s has a width at the base of 13.0s on a column 12.2m long. Find the number of plates and plate heigh. The half width of the same peak is 7.6s. Find the plate height
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
A solute with a retention time of 4 mins 25 second has a base width of...
A solute with a retention time of 4 mins 25 second has a base width of 12 seconds. The column is 30.0m long. How many theoretical plates does the column have? What is length in mm of one theoretical plate?
1.In the following chromatogram, a mixture of pyridine (1), phenol (2), and toluene (3) was separated....
1.In the following chromatogram, a mixture of pyridine (1),
phenol (2), and toluene (3) was separated. Determine the retention
times of the components. Given this order of elution, would you
expect the stationary phase to be polar or non-polar?
Explain why the toluene peak is much shorter than the other two
peaks even though it is approximately the same concentration.
2. Stationary phases come in different varieties. Which of the
two analytes listed for each stationary phase has the greater...
A GC column is operated under the following conditions: Column: 1.10 m x 2 mm packed...
A GC column is operated under the following conditions: Column: 1.10 m x 2 mm packed with Chromosorb P and Carbowax 20M as stationary phase. The following retention times were obtained: air: 18.0 sec; methylacetate: 2.98 min; methyl propionate: 4.56 min. Peak width at half height: methylacetate: 7.7 sec; methyl propionate: 12.4 sec. Calculate: a) the corrected retention time for each solute. b) the capacity factor k' for each solute. c) the selectivity factor α for the pair of solutes....
Q. A) An open tubular column is 30 m long and has an inner diameter of...
Q. A) An open tubular column is 30 m long and has an inner diameter of 0.500 mm. It is coated on the inside wall with a layer of stationary phase which is 30 um thick. Unretained solute passed through in 2.00 min whereas a particular solute has a retention time of 15.20 min. What is the volume flow rate in mL/min. B) Calculate the capacity factor for the solute. C) What was the fraction of time spent in the...
An open tubular column with a diameter of 187 um and a stationary phase thickness on...
An open tubular column with a diameter of 187 um and a stationary phase thickness on the inner wall of 0.88 um passes unretained solute through in 79 s. A particular solute has a retention time of 471 s (b) What fraction of time does this solute spend in the stationary phase? (a) What is the partition coefficient for this solute? Number Number 259.8 4.96 K= total
A solvent passes through a chromatography column in 2.18 min, but the solute requires 8.45 min. What is the retention factor, k? k= What fraction of the time does the solute spend in the mobile phase in the column? I fraction in mobile phase = The volume of the stationary phase is 0.102 times the volume of the mobile phase in the column (Vs = 0.102Vm). What is the partition coefficient, K, for this system? K=
A solvent passes through a chromatography column in 3.41 min, but the solute requires 9.13 min. What is the retention factor, k? k= What fraction of the time does the solute spend in the mobile phase in the column? fraction in mobile phase The volume of the stationary phase is 0.101 times the volume of the mobile phase in the column (V = 0.101V.). What is the partition coefficient, K, for this system?
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
1.In the following chromatogram, a mixture of pyridine (1),
phenol (2), and toluene (3) was separated. Determine the retention
times of the components. Given this order of elution, would you
expect the stationary phase to be polar or non-polar?
Explain why the toluene peak is much shorter than the other two
peaks even though it is approximately the same concentration.
2. Stationary phases come in different varieties. Which of the
two analytes listed for each stationary phase has the greater...
An open tubular column with a diameter of 187 um and a stationary phase thickness on the inner wall of 0.88 um passes unretained solute through in 79 s. A particular solute has a retention time of 471 s (b) What fraction of time does this solute spend in the stationary phase? (a) What is the partition coefficient for this solute? Number Number 259.8 4.96 K= total
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