Question

Does anyone know how to use titration to determine the"quantity" of different functional groups, or give me some papers or literature?
you can send me by email: 993002054@cc.ncu.edu.tw

Answer 1

well with titration to equivalence point you can determine concentration of functional groups you are titrating, namely you can do that only in case where you know which functional group reacts with your specific reagent, so you know for example that NaOH and HCl react in 1:1 ratio and for example H2SO4 reacts with NaOH in 1:2 ratio and from that ratio you can calculate amount of functional groups, hope it makes sense what i have just written

Answer 2

yeah, but what i want to know is that point "which functional group reacts with specific reagent". Could you help me?

Answer 3

not sure which specific group you have in mind

Answer 4

there are often used spectrometric (spectroscopic) methods, where when calibration chart is made a concentration of certain compound or functional group is measured in dependance of reacting agent as intensity of light passed trough the measurement cell according to labert bert's law...

Answer 5

Since I want to determine the "quantity" but not only it exists or not.

Answer 6

yes, so? if you use spectrometric methods you can get quantity if you make calibration line with compound you are trying to get quantity of by making different concentrations of that compound

Answer 7

an NMR spectrum will determine the presence of hydrogen atoms attached to differernt functinoal groups, and the heights of the peaks can be calculated into the relative number of functional groups. I haven't done NMR in 10 years, but I remember that much.

Answer 8

Really? Thank you for your help. I'll try.
Wow! Were you a doctor, master or researcher?

Answer 9

NMR analysis was part of my organic coursework when I was an undergraduate student

Answer 10

cool!
Since I want to know the exact (approximate) content of each function group of my sample and FT-IR cannot help, I know titration may help but it takes a lot of time and has some uncertainty of man-doing work.
Thank you, now I have some directions. ^^