1. Sensitivity in a flow-injection analysis is directly proportional to the height of an analyte's peak in the fiagram, which, in turn, is proportional to the analyte's concentration. Which of the following will increase the sensitivity of a FIA technique? a. decreasing the flow rate b. increasing the flow rate C. decreasing the length and diameter of the tubing used in the FIA system d. A and C e. B and C

Q: A chromatographic analysis is performed with a sample containing toluene and benzene. The column…

A:

Q: [2] How might a better chromatographic separation of solutes be accomplished? [3] What would happen…

A: Chromatography is one of the most important techniques that is used analytical techniques. It is…

Q: in the separation of these 8 organic herbicides using HPLC in two different modes: Isocratic elution…

A: Solution: i) part Comparison of isocratic elution and gradient elution in this experiment: Isocratic…

Q: Which of the following is NOT TRUE about the retention factor assuming all other conditions remain…

A:

Q: What would happen if we use longer columns and select adsorbing materials with 200-400 mesh sizes…

A: Solution is given in the following steps:

Q: Which components in a liquid chromatography (LC) instrument are similar to the experimental set-up?

A: As per the guideline, since you have asked multiple questions, we have solved the first…

Q: How can you vary the retention factor and selectivity factor?

A: Retention factor is a variable which indicates the time duration a component spends in the…

Q: a. What does ECD mean. b. Discuss how column temperature influences separation in a chromatography…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: 30) The separation efficiency of capillary columns over packed columns 31) The most common mobile…

A: Ans. (30) The separation efficiency of capillary columns over packed columns in GC is attributable…

Q: Adenine and caffeine have retention times of 15.50 and 17.63 min, respectively, on a 30.0-cm column.…

A:

Q: How can I calculate the concentration from a GC/MS chromatogram which is having retention time and…

A: GC-MS chromatography also called the gas chromatography mass spectrometry is an analytical tool to…

Q: Column resolution is an indicator to identify the selectivities and efficiencies of the column…

A:

Q: b. Describe the THREE major classification of Chromatography b. Two compounds in gas chromatography…

A: Chromatography is a useful technique to precisely separate, analyse, and purify a wide range of…

Q: 1.2 Consider chromatographic movement from fundamental principles and derive an equation relating…

A: Chromatography is the laboratory technique for the separation and isolation of a variety of samples…

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

A:

Q: Gradient elution used in HPLC. How is the gradient created for a reverse-phase HPLC experiment over…

A: Given that Gradient elution is used in HPLC.  To find: How is the gradient created for the…

Q: Chemistry Yes or No: Topic - HPLC 1.We need the void time so that we have a measure of the retention…

A: Concepts of HPLC.

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: Explain why a chromatographic separation normally has an optimum flow rate that gives the best…

A: When an fast flow rate is maintained, the band is not allowed to spend much time within the column…

Q: Suppose that the sample size was 3.0 mg, the column dimensions were 1.00 m length 3 4.0 mm diameter,…

A:

Q: Draw a schematic diagram of how a Flash Column Chromatography works?  Please answer at your own…

A: Flash column chromatography:  It is a technical chromatography that consumed a compressed gas (such…

Q: High performance liquid chromatography can separate eluates even if they are not present in the UV…

A: The actual separation of each component in a sample is always carried inside a column and to be able…

Q: ▪ In a blood alcohol analysis by GC-FID, methanol elutes at 1 min, ethanol at 2 min, IPA at 3 min,…

A: Answer : Relative retention time  =  retention time of analyte /  retention of known peak based on…

Q: Olivia developed a new dye called Dye C. It was analyzed against other dyes using paper…

A:

Q: Choose the best answer. What are the factors that need to be considered in HPLC to ensure the two…

A: Introduction :  HPLC  means High pressure liquid chromatography it is used to find out the drug…

Q: A solute with a retention time of 400.0 s has a width at half-height of 8.0 s on a  column 12.2 m…

A: Introduction: Chromatography: Chromatography is an analytical technique used to separate the…

Q: SFC combines  important advantages of gas and liquid chromatography. It is especially useful for…

A: The chromatography is the separation technique used for identification and separation of compounds…

Q: 19. What type of sample analysis usually operates on the 10-4 g scale of sample size? A. macro…

A: 19. Option D. Ultra micro analysis

Q: Very pure silver nitrate standard reagent requires standardization with primary standard NaCl or KCl…

A: Silver nitrate standardization requires  Nacl  primary standard. It is true.

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

A: Option C

Q: It refers to the general term of adsorbent media used to visualize chromogenic compounds. A.…

A: Chromatogram refers to the general term of adsorbent media used to visualize chromogenic compounds.…

Q: A mixture of species of A, B, and C is injected into a liquid chromatographic column with length of…

A: Chromatography is an analytical and separation technique which is used to separate the components…

Q: ▪ In a blood alcohol analysis by GC-FID, methanol elutes at 1 min, ethanol at 2 min, IPA at 3 min,…

A:

Q: Determine the Kovats retention index for all six analytes.

A: In gas chromatography, Kovats retention index is used to convert retention times into…

Q: Match column A with column B. v Mobile phase: NON-POLAR Stationary phase: NON-POLAR v mobile phase -…

A:

Q: A chromatography column with a length of 10.3 cm and inner diameter of 4.61 mm is packed with a…

A:

Q: For qualitative analysis with gas chromatography, the retention time of a standard is compared with…

A: Hello. Since your question has multiple parts, we will solve first question for you. If you want…

Q: What is the retention factor of a sample when after injectiion the void time (tM) took 4.18 sec? The…

A:

Q: Methanol and Ethanol are separated in a capillary gas chromatography column with retention times of…

A:

Q: The fluid exiting a chromatographic column is called the eluent eluate analyte solvent Question 22…

A: Chromatography is the laboratory method to separate the components of a mixture.  Elution is the…

Q: Column resolution is an indicator to identify the selectivities and efficiencies of the column…

A: Coloumn resolution is an indicator to identify selectivities and efficiencies of coloumn ability to…

Q: A chromatogram of a two-component mixture on a 25-cm packed LC column is shown in the figure below.…

A:

Q: Which is NOT a factor that affects retention time? I. the pressure used II. The nature of the…

A: the retention time will vary depending on: the pressure used (because that affects the flow rate…

Q: Question 1. Two components in an HPLC separation have retention times that differ by 22 s. The…

A: HPLC ( High performance liquid Chromatography)  It is a useful method for separation of substances…

Q: Gradient elution used in HPLC. How is the gradient created for a reverse-phase HPLC experiment over…

A: High performance liquid chromatography or HPLC is an analytical technique used to identify and…

Q: In comparing direct headspace injections with SPME headspace injections, later eluting peaks (by GC)…

A: Chromatography is a laboratory technique for separation of mixtures. The mixture is dissolved in a…

Q: You must separate three different compounds with reversed phase HPLC. Compound 1 is an acid (pKa =…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A TLC plate showed two spots A and B with Rf 0.20 and 0.30, respectively. Sketch a TLC chromatogram…

A: Sketch of TLC chromatogram: TLC plate = 10cm

Q: What is a correct statement regarding straight (normal) phase silica gel chromatography of compounds…

A: Answers are explained below.