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 $\Delta$ t/t_G 0.40,use gradient elution. C)For 0.25

Question

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 $\Delta$ t/t_G < 0.25,use isocratic elution. B)If$\Delta$ t/t_G > 0.40,use gradient elution. C)For 0.25 < $\Delta$ 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 $\Delta$ t/t_G < 0.25,a good starting isocratic elution solvent composition is the composition halfway through the $\Delta$ t of the scouting gradient. E)For 0.25 < $\Delta$ t/t_G < 0.40,a good starting isocratic elution solvent composition is the composition halfway through the $\Delta$ t_G of the scouting gradient.

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The Answer of 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 $\Delta$ t/t_G < 0.25,use isocratic elution. B)If$\Delta$ t/t_G > 0.40,use gradient elution. C)For 0.25 < $\Delta$ 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 $\Delta$ t/t_G < 0.25,a good starting isocratic elution solvent composition is the composition halfway through the $\Delta$ t of the scouting gradient. E)For 0.25 < $\Delta$ t/t_G < 0.40,a good starting isocratic elution solvent composition is the composition halfway through the $\Delta$ t_G of the scouting gradient.

When Deciding Between an Isocratic Elution or a Gradient Elution,a Δ\DeltaΔ

When Deciding Between an Isocratic Elution or a Gradient Elution,a $\Delta$