Podcast
Questions and Answers
What is the stationary phase in planar chromatography placed on?
What is the stationary phase in planar chromatography placed on?
- A plane surface (correct)
- A narrow tube
- A round surface
- A cylindrical tube
In which technique did Mikhail Tswett introduce column chromatography?
In which technique did Mikhail Tswett introduce column chromatography?
- GC
- Paper chromatography (correct)
- HPLC
- TLC
Which type of stationary phase is best suited for non-polar analytes?
Which type of stationary phase is best suited for non-polar analytes?
- Polar stationary phases
- Stationary phases with capillary action
- Stationary phases with high pressure
- Non-polar stationary phases (correct)
What is the basis of all chromatographic methods according to the text?
What is the basis of all chromatographic methods according to the text?
In planar chromatography, how does the mobile phase move through the stationary phase?
In planar chromatography, how does the mobile phase move through the stationary phase?
What did Mikhail Tswett separate using column chromatography?
What did Mikhail Tswett separate using column chromatography?
What is the definition of the distribution coefficient DA?
What is the definition of the distribution coefficient DA?
Which parameter is sometimes referred to as dead time in chromatography?
Which parameter is sometimes referred to as dead time in chromatography?
What is the significance of substances with high distribution coefficient DA?
What is the significance of substances with high distribution coefficient DA?
Which time is defined as the time for solutes not to move along the column?
Which time is defined as the time for solutes not to move along the column?
What does the hold-up time tM represent in chromatography?
What does the hold-up time tM represent in chromatography?
How is the distribution coefficient DA related to substance retention in chromatography?
How is the distribution coefficient DA related to substance retention in chromatography?
In ion-exchange chromatography, what is covalently attached to the stationary solid phase?
In ion-exchange chromatography, what is covalently attached to the stationary solid phase?
What is the mobile phase in partition chromatography?
What is the mobile phase in partition chromatography?
Which chromatography technique separates molecules by size?
Which chromatography technique separates molecules by size?
What happens to solute molecules in a chromatographic column as the mobile phase moves?
What happens to solute molecules in a chromatographic column as the mobile phase moves?
What is the purpose of retention parameters in chromatographic methods?
What is the purpose of retention parameters in chromatographic methods?
What is typically the inside of the silica chromatography column in gas chromatography?
What is typically the inside of the silica chromatography column in gas chromatography?
What did Van Deemter propose in 1956?
What did Van Deemter propose in 1956?
What does the Van Deemter equation describe?
What does the Van Deemter equation describe?
What does Term A in the Van Deemter equation describe?
What does Term A in the Van Deemter equation describe?
Why do non-retained solutes face multiple pathways during travel via the column?
Why do non-retained solutes face multiple pathways during travel via the column?
What is one reason for peak broadening in chromatography?
What is one reason for peak broadening in chromatography?
What is Eddy diffusion, also known as?
What is Eddy diffusion, also known as?
What is the term related to resistance to mass transfer in the mobile phase?
What is the term related to resistance to mass transfer in the mobile phase?
What represents a function of the retention factor in Equation 2.14?
What represents a function of the retention factor in Equation 2.14?
Which term emanates from mass transfer in the mobile phase?
Which term emanates from mass transfer in the mobile phase?
What type of diffusion describes the transfer process between the mobile and stationary phases?
What type of diffusion describes the transfer process between the mobile and stationary phases?
What does Term A, Eddy diffusion, refer to in chromatography?
What does Term A, Eddy diffusion, refer to in chromatography?
In the context of chromatography, what does Term B represent?
In the context of chromatography, what does Term B represent?
