Question

a. In gas chromatography which parameter is changed to alter retention factors of the solutes? b....

a. In gas chromatography which parameter is changed to alter retention factors of the solutes?
b. In liquid chromatography which parameter is changed to alter retention factors of the solutes?
c. Why does the use of an internal standard with chromatography give more accurate and precise results?

Homework Answers

Answer #1

Hello there.

Below is the answer to your question.

a. In gas chromatography, the solute retention factor can be changed by changing the temperature of the column, or by changing the length of the column or by changing the stationary phase nature that is used in the column.

b. In liquid chromatography, the solute retention factor can be altered by adjusting the solvent strength of the mobile phase, which includes modifying the amount of organic solvent in the mobile phase mixture.

c. The use of internal standard with chromatography give more accurate and precise results as volume errors will be difficult to predict and control. And, correct quantitative analysis will be obtained.

Kindly upvote, if that helped.

Thanks in advance.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
-In gas chromatography, what is retention time? What affect would increasing the column temperature have on...
-In gas chromatography, what is retention time? What affect would increasing the column temperature have on retention time? -Why does the column length affect the ability to separate a mixture of compounds by gas chromatography? -Why is the retention time for solvents like CH2Cl2 and pentane much shorter than the compounds we dissolve in these solvents to analyze using gas chromatography? -A GC sample containing 0.5 mM cyclohexanol was analyzed by gas chromatography to give a peak for cyclohexanol in...
Chromatography Calculations Short Answer: Answer the following short answer questions about Chromatography Calculations (SHOW WORKING): A)...
Chromatography Calculations Short Answer: Answer the following short answer questions about Chromatography Calculations (SHOW WORKING): A) Solute A is eluted through a 17 m chromatographic column with a retention time of 12.40 min and peak base width of 0.98 min, while methane elutes at 1.15 min on the same column. Calculate the number of theoretical plates. B) A solution containing an unknown compound was spiked with n-octane and n-decane and run on a GC using an isothermal oven temperature of...
A few basic gas chromatography questions: In general, how would you determine which of several peaks...
A few basic gas chromatography questions: In general, how would you determine which of several peaks in a chromatogram obtained for a mouthwash sample might correspond to ethanol? (Is your suggested method 100% reliable?) How would you use that peak to determine how much ethanol is present in the mouthwash? In general, will an increase in operating temperature cause a given peak to have a longer or a shorter retention time? Why? In general, will a decrease in mobile phase...
1.)The Buoyant Force from a fluid to an object depends on which of the following factors?...
1.)The Buoyant Force from a fluid to an object depends on which of the following factors? a.)The volume of the object b.)The volume of the fluid c.)The density of the fluid d.)The density of the object 2.)Why did the Titanic sink after it hit an iceberg and water rushed into the hull through the hole created by the collision? a.)The density of water has increased b.)The density of the boat increased c.)The mass of the boat has decreased d.)The volume...
a. The ΔHºsoln (standard state) of KCl is +17.2 kJ/mole (Gas = 1 atm pressure, pure...
a. The ΔHºsoln (standard state) of KCl is +17.2 kJ/mole (Gas = 1 atm pressure, pure gas, Liquid = 1 mole pure liquid, Solid = 1 mole pure compounds, Solutes = 1 M dissolved solute, 25º C (298 K). What is ΔSºsurr ? If the molar solubility of KCl is 4.2 M, what does this tell you about the value and sign of ΔSºsys ? b. Almost all the the salts with negative Sºsoln values share a common property; they...
In which situations does the internal energy of enclosed gas system increase? a. The heat gained...
In which situations does the internal energy of enclosed gas system increase? a. The heat gained by the system is less than the work done by the system on the surroundings when the system expands b. The heat gained by the system is more than the work done by the system on the surroundings when the system expands c. The work done on the system when it is compressed is more than the heat lost by the system to the...
The Standard Hydrogen Electrode (S.H.E.) consists of H2 gas bubbled through a solution of H+ ions;...
The Standard Hydrogen Electrode (S.H.E.) consists of H2 gas bubbled through a solution of H+ ions; which of the following conditions must be met to give E0 = 0.00V, as part of the S.H.E.? I. Temperature of cell is 298 K II. Pressure of the Hydrogen gas is 1 atm III. Concentration of H+ is 1.0 moldm-3 Select one: a. I and II only b. I and III only c. I only d. I, II and III Use the data...
Neon gas (a monatomic gas) and hydrogen gas (a diatomic gas) are both held at constant...
Neon gas (a monatomic gas) and hydrogen gas (a diatomic gas) are both held at constant volume in separate containers. Each container contains the same number of moles n of each gas. You find that it takes an input of 300 J of heat to increase the temperature of the hydrogen by 2.50°C. Part A How many modes does a single hydrogen gas molecule have? (Assume the vibrational modes are "frozen out"). 3, all rotational kinetic 6, 3 translational kinetic...
Suppose there are 500 stocks, all of which have a standard deviation of 0.30, and a...
Suppose there are 500 stocks, all of which have a standard deviation of 0.30, and a correlation with each other of 0.4. (a) Calculate the variance of an equally-weighted portfolio of n such stocks, for n = 2,4,10, 20,50,100,500. Graph your results. (b) Does the variance of this portfolio tend to zero as n → ∞ (that is, if there were many more than 500 stocks)? If so, explain why. If not, what does it converge to then? (c) Repeat...
1. What would be a more appropriate name for 1 methyl butane? 2. A gas occupies...
1. What would be a more appropriate name for 1 methyl butane? 2. A gas occupies 600 ml at 0.75 atm pressure. What will be its volume, at constant temperature, if the pressure is changed to 760 mm Hg? 3. In Propane what is the structural geometry around each Carbon atom? 4. Give two reasons for the diversity of organic compounds. 5. How many moles of NH3 gas are present in a 1.00L flask at STP? 6. Identify the following...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT