A good reason to increase flow rate in chromatography is Choose the right answer (a) to...

A good reason to increase flow rate in chromatography is

Choose the right answer

(a) to minimize eddy diffusion.

(b) to minimize column bleed.

(d) to minimize brand broadening due to mobile phase mass transport.

Solutions

Expert Solution

c) to minimize band broadening due to longitudinal diffusion.

Eddy diffusion is caused by turbulence in solute flow and is not affected by flow rate. Column bleed is primarily caused due to contamination and flow rate doesn't affect it much.

Band broadening due to mobile phase mass transport exhibits H as directly proportional to the flow rate. Hence if flow rate increases,band broadening due to mobile phase mass transport increases.

Band broadening due to longitudinal diffusion is inversely proportional to the flow rate. Hence as flow rate increases, band broadening due to longitudinal diffusion decreases.

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

Please choose the right answer and write the reason whay: According to the Adult Attachment Interview,...

Please choose the right answer and write the reason whay: According to the Adult Attachment Interview, which of the following is NOT an adult attachment classification? Insecure-dismissive Insecure-emotionally immature Insecure-preoccupied secure Wade is quiet, adjusts only gradually to new situations, and has moderately predictable biological cycles. Which kind of temperament does he have? easy slow-to-warm-up fragile difficult A young child sees a dog and exclaims, “Look dad, a cat!” The child only noticed that the animal had 4 legs, like...

When is it a good idea to use flash chromatography?

Is there any reason for why a V-notch weir equation for flow rate will give much...

Is there any reason for why a V-notch weir equation for flow rate will give much different values than the measured flow rate values in an experiment? The professor says this is intentional, and to find the reason why this is. This is the V-notch equation mentioned: Q=(8/15)(Cd)sqrt(2g)tan(theta/2) * H^2.5 The weir used had an angle of 60 degrees and the given discharge coefficient was 0.5767. It should also be mentioned that using a power regression method on the measured...

Please choose the right answer to each question: 1. Proximate cause is the determination that the...

Please choose the right answer to each question: 1. Proximate cause is the determination that the defendant's breach of duty resulted directly in the plaintiff's injury. ( True or False ? ) 2. The idea that we should interact with other people in a manner consistent with the manner in which we would like for them to interact with us is called the ______. ( a. Purpose-Driven Life Rule / b. Ethical Self-Actualization Rule / c. Eighth Commandment of the...

a) Increasing the flow rate of the mobile phase would 1. increase longitudinal diffusion. 2. increase...

a) Increasing the flow rate of the mobile phase would 1. increase longitudinal diffusion. 2. increase broadening due to mass transfer. 3. increase broadening due to multiple paths. b) How many 50 mL extractions will it take to remove 95% of Compound A that is in 20 mL of water, if K = 0.3?

Explain and compare thin layer chromatography with column chromatography (in-detailed answer)

Why the temperature increase when flow rate of air increase in air-ch4 combustion, and equivalence ratio...

Why the temperature increase when flow rate of air increase in air-ch4 combustion, and equivalence ratio always uniforms ??

choose the right answer 1) What would researchers most likely be interested in if they asked...

choose the right answer 1) What would researchers most likely be interested in if they asked consumers, Do you see this product solving a problem or filling a need for you Communicable and believability Need level Gap level Perceived value All of the above 2) What is a way to generate ideas? Interacting with employees Interacting with outsiders Studying competitors Adopting creativity techniques All of the above

Choose the correct answer. A.1. The paradox of sparing: A. occurs when the increase in savings...

Choose the correct answer. A.1. The paradox of sparing: A. occurs when the increase in savings leads to a reduction in total expenditure. B. occurs when the increase in consumption leads to a reduction in total expenditure. C. is a result of fiscal policy. D. is a result of monetary policy. A.2. The productive gap of the economy: A. occurs when monetary policy is effective. B. occurs when fiscal policy is effective. C. is the deviation of real GDP from...

Q1) A monopolist will choose to increase output when Group of answer choices at the present...

Q1) A monopolist will choose to increase output when Group of answer choices at the present level of output, marginal revenue exceeds marginal cost. market price increases. the demand curve shifts to the left. at all levels of output, marginal cost increases. Q2) The deadweight loss that arises from a monopoly is a consequence of the fact that the monopoly Group of answer choices earns positive profits. price is the same as average revenue. price equals marginal revenue. quantity is...

Subjects