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- INTRODUCTION QUALIFICATION AND QUANTIFICATION OF LIMONENE USING GAS CHROMATOGRAPHIC ANALYSIS LAB REPORTUse a suitable model to explain how separation and identification of a mixture of organic compounds can be achieved with a thin layer chromatographic (TLC) technique.Which of the following pairs of compounds would be most easily separated by thin layer chromatography: n-octyl alcohol and 1-octene, hexadecane and octadecane, or chlorobenzene and bromobenzene?
- what chromatography seperation how is tlc part of it1) Study the chromatograph (below) of a mixture of Compounds A and B, run on the GCs in the teaching labs at CU Boulder. Compound A has the shorter retention time. STAAT 61 1.11 227 RT TYPE AREA XXXX XXXX XXXX AREAS 0.009 55874 44.117 ARIHT 0.61 XX XX XX 1.11 2.27 XX XX XX TOTAL AREA=XX MUL FACTOR=XX 1. What is the retention time of compound A? Compound B? 2. Which compound is present in a larger amount? 3. Which compound has the lower boiling point? 4. What would happen to the retention times of compounds A and B if the column temperature were raised? 5. You suspect that compound B is octane. What can you do to provide supporting evidence for this hypothesis?Is it possible to detect metal complexes of organic acids with thin layer chromatography?
- Which one of the following chromatographic techniques is useful in the identification of organic molecules having molecular weights more than 20,000? 1) reverse phase chromatography 2) normal phase chromatography 3) high pressure liquid chromatography 4) gel permeation chromatographyWhy chromatography is an important tool for analysis of organic compounds?8. Derivatiztion of sample is carried out to: a) Improve analyte peak shape analyte resolution b) Increase the detector response c) Improve d) All the above
- Table 1: Selected phytocomponents identified in the plant extract. Retention time, min Name of Compound 10.767 Benzaldehyde 15.790 Azulene 16.002 1-Piperazinecarboxaldehyde 17.935 Phthalan 20.731 2-methoxy-1,3,4-trimethybenzene 24.028 Methylesterpentanoic acid 26.993 Tetradecamethylcycloheptasiloxane 31.753 Hexadecamethyl Cyclooctasiloxane If GC is combined with MS, what data you will add as the 3rd column in Table 1 above. Fill in that data for each of the select identified phytocomponents.A gas chromatography column containing a poly(dimethylsiloxane) stationary phase is used to separate the molecules listed. Place the molecules in the order they will elute from the column. Refer to a list of retention indexes for several molecules. Elutes first hexane benzene heptane 2-pentanone 1-nitropropane octane Elutes last Anawer BankSPECTROPHOTOMETRY 1.) Slope of regression line or Molar absorptivity (µM -1cm-1) is 0.0253 and absorbance of unknown solution is 0.131. What is the concentration of the unknown solution (µM )?