Lab 7: Caffeine Quantification by HPLC

[@motiv8-1225]

Hi, can you tell more about the mobile phases, and column? I am guessing you are using C18 column running isocratic mobile phases but what are the mobile phases? Is that MPA: Water and MPB: ACN or MeOH? Any Ph modifier? Thank you.

[@tulip811]

Thank you for this 👍👍👍 Tomorrow I'll have an exam on this topic (I hope🤡)

[@123456forhad]

Can i see part two please

[@tulip811]

Wait why do we use the peak area 1153.2 ?

[@henriqueisaia]

Hello. Do I need to plot the zero point? In my graph, if the line starts in another point than zero, the results are different and do not make sense to me. Could you help me?

[@user-vr3jm8le6t]

how can i read a whole experimental research article and know these kind of instruments (HPLC) and in the article they don’t even tell u it’s a device they just put shortcuts !ah! I’m reading throu bc i need to summarize it and do a presentation on it and present in front of a whole class and I’m just a 3rd semester chemistry stu I’m gon blow up

[@Biker37798]

Well done

[@jvanvynck]

What is that word you’re saying in reference to the alpha and beta acids? “Prenalated”?

[@benchrisfield9626]

Prenylated refers to the prenyl- (carbon alkene) tail of the alpha and beta acids. Alpha acids have a single prenyl tail while beta acids have two.

[@fahimesharifi6578]

hello, could you please help me to determine Np by HPLC

[@NationBants]

Power point looks boring