In a liquid - liquid extraction, what is preferable? Three extractions with a small volume or one extraction with a large volume. Explain briefly.

Q: d) In a typical HPLC column, 150 atm of pressure is required to push the mobile phase through the…

A: In this question, we have to find out the correct answer of given problem by the help of the concept…

Q: In HPLC, why is purging being done before analysis of samples. Outline the procedure on how purging…

A: High-performance liquid chromatography (HPLC) is one of the separation technique used to analyze of…

Q: What would be the effect of raising the column temperature on the retention rate?

A: A Retention time is a time that a solute spends in a column or it can be defined as the time spent…

Q: Explain how the Rf (Retention Factor)-values can be in agreement or disagreement with the “like…

A: Interpretation -  To explain all about that how the Rf ( Retention factor ) - values can be…

Q: economical purification technique that ca n be pure material? O Distillation O Another extraction…

A:

Q: Which is the more effective extraction technique, single or multiple extractions? Explain.

A: Extraction is a process for separating chemicals based on differences in solubility in two…

Q: Capillary electrophoresis differs from other chromatographic methods because:

A: It uses unique detectors.

Q: what is the difference between liquid phase extraction and solid phase extraction

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

Q: Why line extraction from a point cloud is needed ?

A: Planar structure extraction from point clouds is an important process in many applications.

Q: What are the considerations for choosing the solvent in the extraction?

A: Given: Considerations for choosing the solvent in the extraction.

Q: why is a high supporting electrolyte concentration used in most electroanalytical procedures?

A: High supporting electrolyte concentration used in most electroanalytical procedures because:…

Q: Why is catalytic dewaxing not considered as a separation process?

A: Since Catalytic dewaxing involves breaking and making bonds, so it is usually referred to as a…

Q: a) Discuss the effect of solvent polarity on Rf-values. b)Explain how the Rf (Retention…

A: Since you have posted two questions, we will solve first question for you. Please repost other…

Q: in what situation does one use  thin and/or column chromatography? You can any of theme for anything…

A: Chromatography is an analytical technique to separate mixtures into it's components.  It is also…

Q: Why do we need to add sand on top of the silica in column chromatography? What could happen if we…

A: The presence of different compounds in the mixture is separated by employing the separation methods.…

Q: Find the Rf value from given data. Thank you

A: In Thin Layer Chromatography, the compounds can be separated by the solvents in the TLC plate. The…

Q: What are the advantages and disadvantages of liquid-liquid extraction method?

A: Principal of liquid-liquid extraction method :

Q: from one of our neigboring countries are heavily contaminated with pesticides. Upon analysis, some…

A: WORKING OF SOLID PHASE MICROEXTRACTION :

Q: Differentiate between isocratic elution and gradient elution. Why is gradient elution sometimes a…

A:

Q: .Which of the following solvents is not commonly used in reversed-phase HPLC? a) Ethanol Water b)…

A: The solvent which is not used commonly in HPLC has to be given,

Q: After the liquid-liquid extraction of caffeine, you are removing the dichloromethane solvent on the…

A: The rotary evaporator may be described as the physical efficient technique that is used to convert…

Q: Why is splitless injection used with purge and trap sample preparation?

A: The collection of all of the analyte from the unknown and to inject whole of the analyte into the…

Q: Explain how solid-phase microextraction works. Why is cold trapping necessary during injection with…

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Q: What are the possible reasons why there are no spots on the Developed Plate after analysis?

A:

Q: Explain how solvent trapping and cold trapping work in splitless injection.

A: In Gas chromatography both split and splitless injection takes place. Split injection is used when…

Q: What would be the effect of increasing the carrier gas flow rate on the retention rate?

A: Retention time is the distance that the compound cover from the time of injection till the maxima in…

Q: Type of guard column, separation column, and suppressor used for anion- exchange chromatography?

A: Anion exchange chromatography is a process that  work for the separation of substance based on their…

Q: What effect would the incomplete drying of a sample (e.g., the incomplete removal of a…

A: The melting point will be lowered and broadened.

Q: For the TLCS shown below, both plates have the exact same materials spotted on each lane (that is,…

A: Thin layer chromatography.

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: Before applying the eluent on the column, why is it important to drain the solvent to a level right…

A:

Q: The following conditions may not cause tailing EXCEPT a. Volatile solvent b.Uncovered chamber…

A: TLC is one of the basic technique to get a preliminary idea about the compound synthesized in the…

Q: a pigment in the thin layer chromatography traveled beyond or farther than the solvent front.…

A: As a pigment in the thin layer chromatography traveled beyond or farther the solvent front therefore…

Q: Why should the syringe be removed from the sensor when setting the initial volume for each trial?

A: Option C

Q: Question a) Discuss the effect of solvent polarity on Rf-values.

A: Since you have posted two questions, we will solve first question for you. Please repost other…

Q: How is "Characterization and spectroscopic techniques for analyzing" used in a melting point…

A: Melting point is the temperature when a substance starts melting. The melting point of a compound is…

Q: describe different type of degasser in HPLC system, and why degassing is important in the middle of…

A: Degasser is  very useful in HPLC .the main use of degasser in HPLC are  hellium sparging, sonication…

Q: a) Solid phase extraction E

A: In this question, we have to tell about which pre concentration method would be right for tomato…

Q: At the completion of the experiment, a student measures the solvent front to be 55 mm from the…

A:

Q: For the TLCS shown below, both plates have the exact same materials spotted on each lane (that is,…

A: Distance Travelled by the Sample depends  upon the type of Polar mobile phase used . IF THE mobile…

Q: How does increasing the polarity of the developing solvent affect the Rf of a compound on a silica…

A: TLC stands for Thin Layer Chromatography. This process is basically used for the differentiation of…

Q: the video (liquid-liquid extraction), why is it necessary to turn the separatory funnel upside down…

A: The question is based on the concept of liquid liquid extraction. it is also called solvent…

Q: "Start the chromatography by adjusting the fraction collector to 130 drops per fraction (about 3…

A: It is given that for 130 drops per fraction it shows volume 3 mL That means volume of 130 drops is 3…

Q: 3. Compound A has an Rf of 0.75 and compound B has an Rf of 0.35. Which compound will elute first…

A:

Q: Determine the order of inhibition time of hexane, hexanol and benzene compounds in the reverse phase…

A: Given compounds: Hexane, hexanol and Benzene. To determine: The order of Inhibition time in Reverse…

Q: How GC retention time can be affected by the mobile phase flow rate and the temperature of the…

A:

Q: What roles do solvent, density and polarity play in liquid/liquid extraction

A: i. Solvent =  In liquid - liquid extraction, the solvent which is needed to be extracted should not…

Q: Prepare a procedural flow chart that provides a simplified overview of the entire extraction…

A: The procedural flow chat of extraction process is explained in step 2.

Applications of Molecular Spectroscopy

When light sources pass through the diffraction grating then light splits into different wavelengths. The light source produces two types of patterns that are shown as destructive and non-destructive. The light source is in the form of quanta that is quantitation.