Chapter 26: Q 26.11. (page 716)
What is gradient elution?
Short Answer
Gradient elution is defined as a change in the rate of flow of the mobile phase or a change in the mobile phase's composition.
Chapter 26: Q 26.11. (page 716)
What is gradient elution?
Gradient elution is defined as a change in the rate of flow of the mobile phase or a change in the mobile phase's composition.
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Get started for freeIf a resolution of 1.5 is desired in separating methylcyclohexane and methylcyclohexene in Problem 26-18,
(a) how many plates are required?
(b) how long must the column be if the same packing is used?
(c) what is the retention time for methylcyclohexene on the column of part (b)?
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 .
(d) the time required to separate the two species on the column in part (c).
From the data in Problem 26-14, calculate for species C and D
(a) the resolution.
(b) the length of column necessary to separate the two species with a resolution of 2.5.
From the data in Problem 26-14, calculate for A, B, C, and D
(a) the retention factor.
(b) the distribution constant.
Why does the minimum in a plot of plate height versus flow rate occur at lower flow rates with LC than with GC?
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