When Deciding Between an Isocratic Elution or a Gradient Elution,a

question 6

Multiple Choice

When deciding between an isocratic elution or a gradient elution,a scouting gradient should be done.Which of the criteria below is INCORRECT?

• A)If  t/t_G < 0.25,use isocratic elution.
• B)If  t/t_G > 0.40,use gradient elution.
• C)For 0.25 <  t/t_G < 0.40 use either an isocratic or gradient elution,the decision depending on factors such as available equipment or complexity of the sample.
• D)For  t/t_G < 0.25,a good starting isocratic elution solvent composition is the composition halfway through the  t of the scouting gradient.
• E)For 0.25 <  t/t_G < 0.40,a good starting isocratic elution solvent composition is the composition halfway through the  t_G of the scouting gradient.

Analyze the conditions for long-run equilibrium in a perfectly competitive market.

Identify the conditions under which firms should enter or exit the industry.

Describe the relationship between price, average total cost, and marginal cost in determining firm profitability.

Understand the dynamics of market supply and demand in the short run and long run.

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