Chromatography- Analyzing Analgesics by TLC and Isolation of B-Carotene by Column Chromatography

2. Consider the following example GC Chromatogram from a publication about aggression among Mediterranean Acrobat Ants (C. scutellaris). This particular sample was generated by rinsing hydrocarbons from ant exoskeletons. From the chromatogram, what is the minimum number of unique compunds present in the sample? What data led you to that conclusion? (Don't overthink it) 2 8000000 7000000 6000000 5000000 4000000 3000000 2000000 1000000 Counts (Abundance) 5 19 6 7 0 23.00 24.00 10 | 11 13 17 20 14 15 16 12 teel | 22 19 21 ли 25.00 26.00 27.00 Time "Example of a Gas chromatography-Mass spectrography (GS-MS) chromatogram of hydrocarbon molecules in C. scutellaris" by Filippo Frizzi, et.al, in PLoS One is licensed under CC BY 4.0

Analysis of pure molecules either heterogenous mixture or analysis of pure molecules neither heterogenous mixture nor analysis of pure molecules heterogenous mixture

For part B, it is not 4.98 x 10-41. I put it in and it was wrong. It is looking for P1.

Separate a mixture of Vitamin D and Vitamin B2 (riboflavin) by paper chromatography. The stationary phase is methanol (CH;OH) and the mobile phase is pentane (C;H12). Place the vitamins in order of elution. Explain why using IMF. (Circle polar sites on each molecule and label all 4 molecules as polar or non-polar.) Vitamin B2 ö: డ H3C NH H;C CH3 CH3 CH3 H3C He H3C HO .. He CH2 Vitamin D He CH2OH HO

Separate a mixture of Vitamin D and Vitamin B2 (riboflavin) by paper chromatography. The stationary phase is methanol (CH;OH) and the mobile phase is pentane (C;H12). Place the vitamins in order of elution. Explain why using IMF. (Circle polar sites on each molecule and label all 4 molecules as polar or non-polar.) Vitamin Ba 0: H3C NH H3C CH3 CH3 CH3 H3C He H3C HO CH2 Vitamin D He CH2OH HO

Why is fractional distillation more efficient than simple distillation when purifying liquid mixtures?

A student performed chromatography on a mixture of benzoic acid (C6H5CO₂H), acetophenone (C6H5C(O)CH3) and styrene (C6H5CHCH₂). She used alumina (Al₂O3) as the stationary phase and a 9 : 1 mixture of hexane : ethyl ethanoate as the mobile phase. Rank the order in which the compounds moved, from fastest to slowest. benzoic acid acetophenone styrene

Separate a mixture of Vitamin D and Vitamin B2 (riboflavin) by paper chromatography. The stationary phase is methanol (CH;OH) and the mobile phase is pentane (C3H12). Place the vitamins in order of elution. Explain why using IMF. (Circle polar sites on each molecule and label all 4 molecules as polar or non-polar.) Vitamin B2 H,C. H;C CH3 NH CH, CH3 H,C H- H3C HO- CH2 He Vitamin D He HO CH2OH :애: :애: :애:

Balance

1. The mobile phase in the TLC simulator uses a mixture of the organic compounds: ethyl acetate and hexane. For each compound: circle the polar and nonpolar regions of the molecule, then label each region with the type of attractive force it could use to interact with neighboring molecules. ethyl acetate H :0: Η Η +4 Η H- H Η hexane H- Η Η Η Η Η Η C -C-H H H H H H H

Can you give me a detailed step by step process of how to do this please, thank you !

How else can chromatography be used?   None of these answers are correct.   To wash (or remove) unwanted solvents from a mixture.   To identify or exclude components in a mixture.   To generate IUPAC names for hydrocarbons.

Use 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.

An enzymatic method for determining alcohol in the wine is evaluated by comparison with a gas-chromatography (GC) method. The same sample is analyzed several times by both methods with the following results (% ethanol). The values of alcohol for both enzymatic and GC methods are shown in Table 1. Using a suitable test, determine whether the enzymatic method gives the same value as the GC method at 95% confidence level.

In normal-phase HPLC chromatography, the stationary phase is polar and the mobile phase is nonpolar. In the reversed phase we have just the opposite; the stationary phase is nonpolar and the mobile phase is polar. Describe molecules in which move faster or slower in each case.

Identities of the components in a mixture may be determined by a technique called spiking. Suppose you had run a gas chromatogram on your product and had then deliberately added a drop of a known sample of 3-methylcyclohexene to a drop of your product. What would you expect the new chromatogram to show you?

Using recrystallization techniques, a student attempts to purify 0.50 g of compound H. Based on the solubility of H in the chosen solvent at collection temperature, the maximum percent recovery is 82%. The student obtains 0.396 g of purified crystals. What is their percent recovery? Group of answer choices 41% 64% 79% 82% 97% none of these

One method for quantitative determination of the concentration of constituents in a sample analyzed by gas chromatography is the area normalization method. In this method, complete elution of all of the sample constituents is necessary. The area of each peak is then measured and corrected for differences in detector response to the different eluates. This correction is accomplished by dividing the area by an empirically determined correction factor. The concentration of the analyte is found from the ratio of its corrected area to the total corrected area of all peaks. For a chromatogram containing three peaks, the relative areas were found to be 16.4, 45.2, and 30.2 in the order of increasing retention time. Calculate the percentage of each compound if the relative detector responses were 0.60, 0.78, and 0.88, respectively