1. This chromatographic parameter is a measure of efficiency. 2. A high value of the means high efficiency. 3. | is both a measure of selectivity and efficiency. 4. To measure the void time a is use. 5. A higher value of| means higher HETP. 6. Another term for retention factor is 7. is ability of the chromatographic system to discriminate diffe analytes. 8. The plot of the detector response vs. time is called a distance of the peak maxima from the iniection point expres

1. This chromatographic parameter is a measure of efficiency. 2. A high value of the means high efficiency. 3. | is both a measure of selectivity and efficiency. 4. To measure the void time a is use. 5. A higher value of| means higher HETP. 6. Another term for retention factor is 7. is ability of the chromatographic system to discriminate diffe analytes. 8. The plot of the detector response vs. time is called a distance of the peak maxima from the iniection point expres

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter27: Gas Chromatography

Section: Chapter Questions

Problem 27.26QAP

See similar textbooks

Similar questions

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.
the efficiency of a chromatographic column improves the measure thata.increases the height of the theoretical dishesb.decreases the number of theoretical platesc.platform height is reducedd.None of the above Which option is correct And explain
1,9
Anion and cation chromatography can be achieved by modifying? A. Type of dye B. Mobile phase C. Wavelength D. Stationary phase
Identify the simplest chromatographic system: A. Thin layer B. Ion exchange C. Molecular exclusion D.Gas E. Reverse phase
PLS ANSWER ALL// Choose the correct letter
The chromatogram below show a separation of a mixture of 2 components injected in a 25cm column at a flow rate of 0.4 mlmin-1. Answer the following questions :a. Find the times that components A and B spend in the stationary phase.b. Find the retention times for A and B.c. Determine the retention factors for the two components.d. Find the full widths of each peak and the full width at half maximum values.e. Find the resolution of the two peaks.f. Find the average number of plates for the column.g. Find the average plate height.h. What column length would be needed to achieve a resolution of 1.75?i. What time would be required to achieve the resolution in part h.j. Assume that the column length is fixed at 25 cm and the packing material is fixed. Whatmeasurescould you take to increase the resolution to achieve baseline separation?k. Are there any measures you could use to achieve a better separation in a shorter time withthe samecolumn as in part j?
Chemistry SUGGEST REASONABLE CLASSIC COLUMN DIMENSIONS FOR CHROMATOGRAPHING 0.5G OF SAMPLE ON ALUMNIA
A chromatographic peak has a retention time of 120 s. the width at the base of the peak equals 3.2s, at the intersection of the sides of the peak with the baseline. If the column is 200 cm long. a.What is the number of theoretical plates. b. The equivalent height of each plate. c. The sensitivity of the method if the retention time of the mobile phase is 50 s.
Which of the following can improve the separation of components in chromatography? A. Using open-tubular columns B. Increasing the pressure in the column. C. Increasing the flow rate D. Changing the polarity of the mobile phase gradually. E. Increasing the temperature of the column. .
In choosing a mobile phase for chromatography, which characteristic is preferred? a. Volatile b. Inert
Define, describe, or illustrate the following: a. Selectivity factorb. Resolution factorc. Van Deemter’s equationd. Retention time/ volumee. Dead time