Help please : When comparing HPLC with Gas Chromatography , Gas Chromatography analysis may require a chemical derivatisation step before analysis of your sample. Define chemical derivatisation, state why it is needed and briefly describe the methods that can be used to make your sample more appropriate for GC ?

Q: 8. Compare the advantages and limitations of column chromatography with those of thin-layer and gas…

A: Column Chromatography Thin layer Chromatography Gas Chromatography Column Chromatography is used…

Q: Muna Al Naabi in the Analytical chemistry laboratory wanted to separate chlorophenol by liquid…

A: LIQUID CHROMATOGRAPHY(LC):  An analytical technique which is used to isolate a chemical sample into…

Q: If you perform a column chromatography based on the present TLC analysis, which compound is eluted…

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Q: Chromatography

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Q: When using gas chromatography, how is optimum column efficiency obtained? A. When the samples are…

A: Gas chromatography is analytical technique that used in analytical chemistry for separating and…

Q: What is the ideal TLC R; for column chromatography application? Why is it advisable to run a TLC…

A: The answer of the question is given below:

Q: You are attempted to purify a compound via column chromatography. Before starting the process, you…

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Q: Which is the correct order of elution of a gas chromatography that has a polar column that contains…

A: The sample, which may be a gas or a liquid, is injected into a gaseous mobile phase during gas…

Q: Arrange in INCREASING Rf if the mixture underwent paper chromatography with the same solvent system.…

A: Paper Chromatography is partition or adsorption chromatography based on the affinity towards…

Q: Is TLC chromatography and paper chromatography in a normal phase chromatography or reverse phase…

A: Solution- TLC- Thin layer chromatography. Paper chromatography

Q: When you try separating an unknown mixture by normal-phase liquid chromatography with 50% hexane and…

A: As we know hexane is more less polar than methyl t-butyl ether. That is methyl t-butyl ether is more…

Q: errors in thin layer chromatography?

A: Thin Layer Chromatography (TLC) is used in order to separate components in a reaction mixture.

Q: n lab two different mobile phase compositions (acetone and hexanes) were used for column…

A: The solution of the question is given below:

Q: Which one of the following approaches would be inappropriate for the introduction of the sample in…

A: ICP-MS is a type of mass spectroscopy which is used to ionize a sample.

Q: A certain mixture contains the following compounds: propionic acid, 2-hexanol, isoamyl acetate, and…

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Q: 2. A TIc plate was run on the fractions (#1-4) collected from a silica gravity column chromatography…

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Q: 2. A Tlc plate was run on the fractions (#1-4) collected from a silica gravity column chromatography…

A: According to the company guidelines, we have to answer the first question only. So, please kindly…

Q: Which of the following statements about the setup of thin layer chromatography is FALSE?     The…

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Q: Which of the following is TRUE for a reversed phase chromatography experiment? i. Less polar…

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Q: Which of the following is not a method for measuring reaction rates? A) total pressure B) thin layer…

A: A multiple choice question based on measuring reaction rate, which is to be accomplished.

Q: A student places an unknown sample on a thin-layer chromatography plate and develops it in…

A: The important points in the question are: An unknown sample was placed on a thin-layer…

Q: A chemist was able to extract a biologically active compound and wants to purify the sample since he…

A: THIN LAYER CHROMATOGRAPHY: A chromatographic technique which is used to separate or purify the…

Q: The following are all considered problems in chromatographic separations. Briefly, discuss how each…

A: Peak fronting occurs when the solubility of the given sample in the given stationary phases is too…

Q: What is the effect of mobile phase on each (known) sample when doing Gas Chromatography?

A: Gas chromatography (GC) is a special type of chromatographic separation technique that is used to…

Q: Suppose you are planning the separation of three compounds (A, B, and C) by column chromatography…

A: The retention factor (Rf-value) is the ratio of distance travelled by compound to the distance…

Q: Gestation time arrangement of Hegran, Hexanol, and Benzene compounds in the reverse phase of column…

A: A question based on analytical process that is to be accomplished.

Q: Explain how separation generally occurs in chromatography. What are the factors affecting the Rf…

A: Chromatography : Chromatography is a technique used in the laboratories for the separation of the…

Q: Which of the following chromatographic methods cannot use a mixture of liquid solvents (eluents)…

A: Chromatographic separation porocess and eluent for chromatographic separation.

Q: Retention time can be used to identify a compound in a mixture using gas chromatography. Choose a…

A: We have to tall which parameter will not affect the retention time of a compound in a gas…

Q: C- CH3 C-OH A В

A: Ethyl acetate is highly polar compound solvent. As ethyl acetate contains two polar bonds(CO and CO)…

Q: 1. In thin layer chromatography (TLC), why do you need to use a pencil in marking the spots, origin,…

A: 1. Marker spot is soluble in the solvent. Therefore it will move on TLC plate with solvent. 2.…

Q: i) Put the steps of a column chromatography analysis in a correct order. a. Elute the column with…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 1- What are the main two types of columns in the HPLC? 2-What are the most disadvantages of…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Which one of the following chromatographic techniques is useful in the identification of organic…

A: Chromatography is used to know the molecular weight . Here the known polymer is used to made the…

Q: A student used thin layer chromatography to confirm whether he could successfully separate two…

A: TLC means “Thin Layer Chromatography”. This experiment is done on Wattman paper. If the molecule has…

Q: Explain why the indicators, red and blue,  are separated on the TLC plate during a chromatography…

A: Thin ayer chromatography is a chromatography technique, which is used to separate non-volatile…

Q: For thin layer chromatography, why should a piece of filter paper that is moistened with the…

A: Purpose of the Filter Paper in the Thin-Layer Chromatography :- Filter paper is placed in the…

Q: The following questions regard the chromatograms shown below: Which column gives a greater…

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Q: Which among the following applies to reversed phase chromatography?    i. Compounds of low polarity…

A: The correct answer about reversed phase chromatography is given below

Q: A chromatographic column is eluted with a solution containing a mixture of two components, X and Y.…

A: The order of elution of different components in a mixture in a chromatographic column, is determined…

Q: Chromatographic analysis using gas-liquid chromatography with a 40-cm packed column gave the…

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Q: In paper chromatography, which of the following may cause premature separation? Select one: a.…

A: Given :  In paper chromatography, which of the following may cause premature separation?

Q: You were analyzing a mixture of volatile solvents using Gas Chromatography and found out that two…

A: Chromatography is the method for the separation of a mixture with very high resolution, which is an…

Q: ) You perform column chromatography on a sample of clove oil and collect a total of 16 fractions.…

A: The main components of clove oil are eugenol, eugenol acetate and caryophyllene. The structures of…

Q: 2. When separating acetone (an organic liquid) from LiBr (a solid impurity), which would be the most…

A: Acetone is an organic liquid so it is volatile in nature while LiBr is solid so it is very less…

Q: What kind of mixtures are separated by gas-solid chromatography?

A: Gas-solid chromatography is based on the absorption of gaseous substances on solid surfaces. In…

Q: THIN LAYER CHROMATOGRAPHY  IS A (LIQUID LIQUID) PARTITION TECHNIQUE SIMILAR TO COLUMN…

A: Thin Layer Chromatography (TLC) is a solid-liquid technique in which the two phases are a solid…

Q: . What factors can affect a solute's Rf value in thin-layer chromatography? 2. Why is it necessary…

A: Answer - According to the question - Rf values and reproducibility can be affected by a number of…

Q: Compare the principles of sugar separation using paper chromatography and high performance…

A: Paper Chromatography: Paper chromatography is a technique which is used to separate…