Question: HIGH PERFORMANCE CHROMATOGRAPHY (HPLC) Question 1. What is the difference between a C18 and a C4 column chemistry? Question 2. When would you use a

HIGH PERFORMANCE CHROMATOGRAPHY (HPLC)

Question 1. What is the difference between a C18 and a C4 column chemistry? Question 2. When would you use a gradient regimen instead of an isocratic regimen? Please help me.

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