What length of column would be required to just resolve two peaks with retention times of...
What length of column would be required to just resolve two peaks with retention times of 92 and 107 s, respectively, using a column with an Hof 1.60 cm/plate?
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What length of column would be required to just resolve two
peaks with retention times of...
4. The compounds in a mixture separated by GC can be identified by their retention times....
4. The compounds in a mixture separated by GC can be identified by their retention times. If you Suructor nad not told you which peak in the GC chromatogram corresponded to which alker you didn't know the boiling points of the alkenes, how could you determine the identity or each peak by its retention time? Identities of the components in a mixture separated by GC can also be determined by the technique called "spiking". Suppose you had run a chromatogram...
Two compounds C and D are separated on a column 34 cm long . Given the...
Two compounds C and D are separated on a column 34 cm long . Given the chromatographic data below calculate The column resolution? , the number of theoretical plates ?the height of theoretical plate and what length of column would be required to give a resolution of 1.5? Compound C retention time 18.3 width at base of peak(min) = 2.18 Compound D retention time 17.7, width at base 1.23
In gas chromatography, when two compunds have very similar retention times, explain what change could be...
In gas chromatography, when two compunds have very similar retention times, explain what change could be made to 1. pressure 2 heating ramp rate and 3 length of column to achieve a better separation. thankyou!
What would happen to the retention time of a compound if the following changes were made?...
What would happen to the retention time of a compound if the following changes were made? Decrease the flow rate of the carrier gas Increase the temperature of the column Increase the length of the column How do the temperature and flow rate of the carrier gas affect the separation of two compounds that have been shown to separate by GC? 5. Rank the following compounds in terms of expected retention times on a non-polar GC Column TOH OCH.CH MW-114...
(3) During the separation of two steroids by HPLC on a C18 column, a student reported the following elution times with...
(3) During the separation of two steroids by HPLC on a C18 column, a student reported the following elution times with a certain % acetonitrile/water mobile phase (uracil was added to the steroid mixture) tm (uracil) 1.2 min t, (steroid1) 4.55 min t, (steroid2) 6.55 min base width, w (steroid 1) 0.56 min base width, w (steroid 2) 0.79 min a. Sketch the chromatogram to illustrate the above separation. Label the peaks and the x- and y-axis. Calculate the resolution...
A peak elutes from an HPLC column 17.3 cm in length in 14.0 min. What would...
A peak elutes from an HPLC column 17.3 cm in length in 14.0 min. What would be the width at half-height of the peak (in seconds) if the plate height were 4.83 um? W1/2 = What would be the width at half-height of the peak (in seconds) if the plate height were 39.0 um? W1/2 =
A peak elutes from an HPLC column 11.8-cm in length in 13.8 min. What would be...
A peak elutes from an HPLC column 11.8-cm in length in 13.8 min. What would be the width at half-height of the peak (in seconds) if the plate height were: (a) 6.9 μm? (b) 36 μm?
need help with number 2 HW #3 for Chem 318 Due: April 29, 2019 1. Solute A has a K 2.5 for an extraction between water (phase 1) and chloroform (phase 2). If 100 mL of a 0.01 fraction will be extr...
need help with number 2
HW #3 for Chem 318 Due: April 29, 2019 1. Solute A has a K 2.5 for an extraction between water (phase 1) and chloroform (phase 2). If 100 mL of a 0.01 fraction will be extracted? For the same solute and, what fraction will be extracted if 5 extractions wi 80 mL chloroform each are used (instead of one 400 ml extraction)? M solution containing solute A in water is extracted one time with...
A number of factors determine the rate at which a given compound travels through a gas chromatograph. List two of t...
A number of factors determine the rate at which a given compound travels through a gas chromatograph. List two of these factors: The period following injection that is required for a compound to pass through the column is called the What would happen to the retention time of a compound if the following changes were made? Decrease the flow rate of the carrier gas Increase the temperature of the column Increase the length of the column How do the temperature...
Honeycomb Flow Straightener - Anti-Turbulence Screens Silencer Fan Test Section Diffuser Iniet Assuming a circular cross...
Honeycomb Flow Straightener - Anti-Turbulence Screens Silencer Fan Test Section Diffuser Iniet Assuming a circular cross section, the atmospheric pressure is 101.325 kPa, density of air is 1.2 kg/m², and absolute viscosity of air is 1.825*10% Ns/m? (assume there are no losses in the wind tunnel) Contraction ratio: 7 Diffuser length: 3 m Test section diameter = test section length = 70 cm a) When a static-pitot tube placed in the test section with a manometer (manometer fluid is water...
4. The compounds in a mixture separated by GC can be identified by their retention times. If you Suructor nad not told you which peak in the GC chromatogram corresponded to which alker you didn't know the boiling points of the alkenes, how could you determine the identity or each peak by its retention time? Identities of the components in a mixture separated by GC can also be determined by the technique called "spiking". Suppose you had run a chromatogram...
What would happen to the retention time of a compound if the following changes were made? Decrease the flow rate of the carrier gas Increase the temperature of the column Increase the length of the column How do the temperature and flow rate of the carrier gas affect the separation of two compounds that have been shown to separate by GC? 5. Rank the following compounds in terms of expected retention times on a non-polar GC Column TOH OCH.CH MW-114...
(3) During the separation of two steroids by HPLC on a C18 column, a student reported the following elution times with a certain % acetonitrile/water mobile phase (uracil was added to the steroid mixture) tm (uracil) 1.2 min t, (steroid1) 4.55 min t, (steroid2) 6.55 min base width, w (steroid 1) 0.56 min base width, w (steroid 2) 0.79 min a. Sketch the chromatogram to illustrate the above separation. Label the peaks and the x- and y-axis. Calculate the resolution...
A peak elutes from an HPLC column 17.3 cm in length in 14.0 min. What would be the width at half-height of the peak (in seconds) if the plate height were 4.83 um? W1/2 = What would be the width at half-height of the peak (in seconds) if the plate height were 39.0 um? W1/2 =
need help with number 2
HW #3 for Chem 318 Due: April 29, 2019 1. Solute A has a K 2.5 for an extraction between water (phase 1) and chloroform (phase 2). If 100 mL of a 0.01 fraction will be extracted? For the same solute and, what fraction will be extracted if 5 extractions wi 80 mL chloroform each are used (instead of one 400 ml extraction)? M solution containing solute A in water is extracted one time with...
A number of factors determine the rate at which a given compound travels through a gas chromatograph. List two of these factors: The period following injection that is required for a compound to pass through the column is called the What would happen to the retention time of a compound if the following changes were made? Decrease the flow rate of the carrier gas Increase the temperature of the column Increase the length of the column How do the temperature...
Honeycomb Flow Straightener - Anti-Turbulence Screens Silencer Fan Test Section Diffuser Iniet Assuming a circular cross section, the atmospheric pressure is 101.325 kPa, density of air is 1.2 kg/m², and absolute viscosity of air is 1.825*10% Ns/m? (assume there are no losses in the wind tunnel) Contraction ratio: 7 Diffuser length: 3 m Test section diameter = test section length = 70 cm a) When a static-pitot tube placed in the test section with a manometer (manometer fluid is water...
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