3C. Below are the gas chromatography results of two separate distillations of the same 1:1 mixture of ethanol and 1-butanol. One sample was obtained from the first fraction of a simple distillation and one sample was obtained from the first fraction of a fractional distillation. Identify the peaks in the chromatographs. Discuss the conclusions you can make regarding simple distillation compared with fractional distillation. Which method was more successful? Intensity (PA) Intensity (PA) 600000 500000 400000 300000 200000 100000 0 -100000 600000 500000 400000 300000 200000 100000 0 -100000 0.5 1 0.5 1 1 2 Simple Distillation GC 1.5 1 2 2 Simple Distillation Peak Number Retention Time (min) Peak Area %) 2.198 3.389 1.5 2.5 Fractional Distillation GC Time (min) 2 2.5 3 Time (min) 3.5 3 69.489 30.511 3.5 Fractional Distillation Peak Number Retention Time (min) Peak Area %) 2.226 95.381 3.513 4.619 4 4 4.5 4.5

3C. Below are the gas chromatography results of two separate distillations of the same 1:1 mixture of ethanol and 1-butanol. One sample was obtained from the first fraction of a simple distillation and one sample was obtained from the first fraction of a fractional distillation. Identify the peaks in the chromatographs. Discuss the conclusions you can make regarding simple distillation compared with fractional distillation. Which method was more successful? Intensity (PA) Intensity (PA) 600000 500000 400000 300000 200000 100000 0 -100000 600000 500000 400000 300000 200000 100000 0 -100000 0.5 1 0.5 1 1 2 Simple Distillation GC 1.5 1 2 2 Simple Distillation Peak Number Retention Time (min) Peak Area %) 2.198 3.389 1.5 2.5 Fractional Distillation GC Time (min) 2 2.5 3 Time (min) 3.5 3 69.489 30.511 3.5 Fractional Distillation Peak Number Retention Time (min) Peak Area %) 2.226 95.381 3.513 4.619 4 4 4.5 4.5

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

Chapter28: High-performance Liquid Chromatography

Section: Chapter Questions

Problem 28.7QAP

See similar textbooks

Similar questions

You are carrying out an experiment by analysing alcoholic drinks by gas chromatography. Why is Gas chromatography the best technique used for this analysis? Why is Carbowax a suitable stationary phase for this analysis? What gases are used and what is their purpose and source?
Q. No. 5 Write functions and procedure of analysis of various volatile organic molecules by using Gas chromatography
Briefly explain the principles involved in the separation of the components of a mixture by solvent extraction.
what are key reactions involved in seperation of liquid mixtures by simple and fractional distillation and gas chromatography? chemicals used: 10ml 1:1 mixture of ethyl and butyl acetate techniques: simple and fractional distillation, gas chromatography. target molecules: Ethyl acetate C4H8O2 Butyl acetate C6H12O2
Why is the Refractive Index of hexane closer to the refractive index of heptane in both simple and fractional distillation?
List and describe two methods that can used to improve the separation of a liquid mixture by fractional distillation
Differentiate normal phase chromatography from reverse phase chromatography. From which of the two governs the thin layer chromatography of plant pigments? How do you say so?
1. Calculate the capacity factor, k' for methyl paraben and propyl paraben. 2. Calculate the selectivity factor, a for the two-component mixture.
Describe in words and by means of complete chemical equations, how a mixture of 1.25 g of benzoic acid tertbutylbenzene can be separated by applying the separation of 2 components by liquid-liquid extraction.
1. What is the significance of Rf values?2. What is the basis for the separation of components of mixtures by paperchromatography?3. Give 3 important applications of chromatography.4. Define or describe each of the following terms: - Chromatography- Development- Solvent front- Stationary phase - Chromatogram- Adsorbent- Mobile phase- Rf
Oral rehydration salts are stated to contain the following components: Sodium Chloride 3.5g Potassium Chloride 1.5g Sodium Citrate 2.9g Anhydrous Glucose 20.0g 8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were: Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5. Atomic weight of Na = 23. The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample. The stated should be 104.5, how??
Oral rehydration salts are stated to contain the following components: Sodium Chloride 3.5g Potassium Chloride 1.5g Sodium Citrate 2.9g Anhydrous Glucose 20.0g 8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were: Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5. Atomic weight of Na = 23. The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample.