Homework Answers
Gas Chromatography can detect the compound to a minute quantity such as part per billion. A large variety of samples can be analyzed by gas chromatography. But a major factor involves, compound must not be degradable and must vaporize. Compound with low boiling point are eluted at first compared to the high boiling point.
Lab #2: Gas Chromatography Theory behind gas chromatography What do all types of chromatography share in...
Lab #2: Gas Chromatography Theory behind gas chromatography What do all types of chromatography share in common? Relationship between retention time and boiling point/vapor pressure How changing parameters affect the retention time Ramp rate Temperature Length of column Pressure Whether column is packed or unpacked
In paper and gas chromatography, how are intermolecular forces involved between the compounds that are to...
In paper and gas chromatography, how are intermolecular forces involved between the compounds that are to be separated? What if the stationary and mobile phases are non-polar and the compounds are polar or vice-versa? How do intermolecular forces affect retention time/retention factor? Thank you in advance!
Carotenoids can be analyzed by chromatography. Both NP and RP-HPLC work. How do these two forms...
Carotenoids can be analyzed by chromatography. Both NP and RP-HPLC work. How do these two forms of HPLC differ (1)? Name at least 2 detectors other than a mass spectrometer that would work in conjunction with HPLC (with different detection principles) (4)! What would be a challenge for carotenoid identification if they were analyzed by LC/MS (1)
9 VII. Gas Chromatography 1. The organic mixture to be separated on the GC is injected...
9 VII. Gas Chromatography 1. The organic mixture to be separated on the GC is injected into the GC as a (gas, liquid, or solid). 2. The typical volume of mixture injected into a GC is 1-10 (microliters, milliliters, or deciliters). 3. Immediately upon entering the injection port the mixture is_ _(solidified, condensed, or vaporized). (heated, cooled, maintained at room 4. The event described in #3 occurs because the injection port is temperature). 5. An inert gas, referred to as...
What are the advantages and disadvantages of thin-layer chromatography, adsorption column chromatography, and gas chromatography techniques?...
What are the advantages and disadvantages of thin-layer chromatography, adsorption column chromatography, and gas chromatography techniques? (advantages and disadvantages for each type)
A student analyzed a mixture of two unknown compounds, A and B. The picture below shows...
A student analyzed a mixture of two unknown compounds, A and B. The picture below shows the paper chromatography results for the mixture. Calculate the R_r values for the components of the mixture. (Round your answers to one significant figure.) Which compound is more polar? It cannot be determined from these chromatography results. Compound B Compound A
How can gas chromatography be used in the identification of a compound?
How can gas chromatography be used in the identification of a compound?
Gas Chromatography 1. A sample of a mixture of ethyl acetate (Rt = 1.67 min) and...
Gas Chromatography 1. A sample of a mixture of ethyl acetate (Rt = 1.67 min) and toluene (Rt = 2.65 min) was analyzed by gas chromatography and the following results obtained: Peak # Time [min] Area (uV sec) Area [%] 8.703 1.32 3708 1.67 16449 38.61 52.69 2.65 22449 a. Provide one explanation why three signals were obtained b. What is the normalized percentages of ethyl acetate and toluene.
2. An unknown compound was analyzed using thin layer chromatography, its constituted of two components (A...
2. An unknown compound was analyzed using thin layer chromatography, its constituted of two components (A and B) as shown in the TLC (Silica coated stationary phase; Chloroform and Ethyl acetate as mobile phase). The mixture was then loaded onto column with silica as the stationary phase and the same solvent system was used. (2 points) Column Chromatography TLC time A В Predict the order of elution of the compounds (A and B). which one would be eluted first/last and...
Can you compare and contrast analyzing sugars in gas chromatography using derivatization and HPLC? What are...
Can you compare and contrast analyzing sugars in gas chromatography using derivatization and HPLC? What are its advantages and disadvantages?
Lab #2: Gas Chromatography Theory behind gas chromatography What do all types of chromatography share in common? Relationship between retention time and boiling point/vapor pressure How changing parameters affect the retention time Ramp rate Temperature Length of column Pressure Whether column is packed or unpacked
9 VII. Gas Chromatography 1. The organic mixture to be separated on the GC is injected into the GC as a (gas, liquid, or solid). 2. The typical volume of mixture injected into a GC is 1-10 (microliters, milliliters, or deciliters). 3. Immediately upon entering the injection port the mixture is_ _(solidified, condensed, or vaporized). (heated, cooled, maintained at room 4. The event described in #3 occurs because the injection port is temperature). 5. An inert gas, referred to as...
A student analyzed a mixture of two unknown compounds, A and B. The picture below shows the paper chromatography results for the mixture. Calculate the R_r values for the components of the mixture. (Round your answers to one significant figure.) Which compound is more polar? It cannot be determined from these chromatography results. Compound B Compound A
How can gas chromatography be used in the identification of a compound?
Gas Chromatography 1. A sample of a mixture of ethyl acetate (Rt = 1.67 min) and toluene (Rt = 2.65 min) was analyzed by gas chromatography and the following results obtained: Peak # Time [min] Area (uV sec) Area [%] 8.703 1.32 3708 1.67 16449 38.61 52.69 2.65 22449 a. Provide one explanation why three signals were obtained b. What is the normalized percentages of ethyl acetate and toluene.
2. An unknown compound was analyzed using thin layer chromatography, its constituted of two components (A and B) as shown in the TLC (Silica coated stationary phase; Chloroform and Ethyl acetate as mobile phase). The mixture was then loaded onto column with silica as the stationary phase and the same solvent system was used. (2 points) Column Chromatography TLC time A В Predict the order of elution of the compounds (A and B). which one would be eluted first/last and...
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