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.

---

Definitions:

Risk-Free Asset

An investment with a guaranteed return and no possibility of default, typically associated with government bonds.

Market Return

The total gain or loss on an investment over a specified period, including dividends and capital gains.

Systematic Risk

It represents the risk inherent to the entire market or market segment, often influenced by factors such as economic, political, or social changes.

Treasury Bills

Short-term government securities issued at a discount from the par value and paying no interest, maturing in one year or less, representing a secure, liquid investment.