(a)
Interpretation:
The definition of retention volume is to be stated.
Concept introduction:
Retention volume is a quantity that corresponds to the product of retention time and volumetric flow rate of the solvent. The retention volume is proportional to the retention time. The flow rate of the solvent is the rate which is necessary for the operation to take place.
(b)
Interpretation:
The definition of corrected retention volume is to be stated.
Concept introduction:
The volume at the mean column pressure is known as the corrected retention volume. This volume is the product of retention volume and pressure corrected factor. Corrected retention volume is dependent upon the volumes of sample, detector and column.
(c)
Interpretation:
The definition of specific retention volume is to be stated.
Concept introduction:
The ratio of column temperature in Kelvin to the density of the liquid that is used in the stationary phase is called specific retention volume. It is influenced by the density of the liquid used for making the stationary phase and distribution constant of the solute.
Want to see the full answer?
Check out a sample textbook solutionChapter 27 Solutions
Principles of Instrumental Analysis
- 2-pentanone has a retention index of 987 on a poly(ethylene glycol) column (also called Carbowax). (a) Between which two straight-chain hydrocarbons is 2-pentanone eluted? (b) An unretained solute is eluted from a certain column in 1.80 min. Decane (C10H22) is eluted in 15.63 min and undecane (C11H24) is eluted in 17.22 min. What is the retention time of a compound whose retention index is 1 050?arrow_forward▪ In a blood alcohol analysis by GC-FID, methanol elutes at 1 min, ethanol at 2 min, IPA at 3 min, and IS at 4 min. In the patient sample, the analyte elutes t 2 min and the IS at 8 min. What is the relative retention time and the analyte in the patient? A) methanol B) Ethanol chu C) IPAarrow_forward(i) Calculate the capacity factors (k') for both compounds A and B and the selectivity factor (a) between them, commenting on the values. (ii) Calculate the resolution between A and B and comment on it. (iii) Using the peak for A, calculate the number of theoretical plates for the GC column and comment on the quality of the column.arrow_forward
- Describe how to obtain a Retention Factor. What does the retention factor tell you?arrow_forwardQ4 (a) Analyze the importance of dropping mercury electrode on polarography. (b) (i) Calculate the molarity of MgSO4 in a solution containing 1.5 g ofMgSO4 in a volume of 250 mL?(ii) Calculate the weight of MgSO4 in grams which is present in 100mL of 0.076 M MgSO4?(c) Evaluate the key differences between paper chromatography and gaschromatographyarrow_forwardWhat is paper chromatography please include the importance of using itarrow_forward
- [1] In paper chromatography, why do some ions move only a short distance from the point of application while others move much more?arrow_forwardUse a chemical dictionary, chemical text or encyclopedia to find a specific definition of "chromatography." List a few mobile and stationary phases.arrow_forward(i) Name three common uses of High Performance Liquid Chromatography (HPLC) in the laboratory. b.arrow_forward
- A solute has a retention time of 5.4 min with a width at half height of 0.41 min on a column 12.2 m long. Find the number of plates. Please round-off your answer to a whole number (no decimal place)arrow_forwardRetention time is the time taken for the mobile phase to reach the detector. True Falsearrow_forwardIn chromatography, the compound that is least soluble in the mobile phase a) Travels the furthest away from the line of origin b) Stays closest to the line of originarrow_forward
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning