I'm working on polymer.
I've tried 8mg sample in 0.6 ml solvent for 13C NMR but I got a high noise spectrum.
Any specific amount for polymer sample in running NMR ?
Dear Ki yan Lam, two main reasons may be behind this behavior. Either the concentration is high and this is solvable by simple dilution, or the polymer chains still didn't reached the relaxation time equilibrium upon solvation. Please check the following documents. My Regards
https://doi.org/10.1016/0032-3861(79)90162-9
Ki yan
Is your 8mg sample fully soluble in the solvent?
Sorry for asking!
Dear Ki yan Lam, two main reasons may be behind this behavior. Either the concentration is high and this is solvable by simple dilution, or the polymer chains still didn't reached the relaxation time equilibrium upon solvation. Please check the following documents. My Regards
https://doi.org/10.1016/0032-3861(79)90162-9
Minimum amount of polymer samples needed for 1H-NMR 8 to 10mg and and 13C-NMR about 30 to 40mg . For better resolution the sample must be fairly soluble otherwise you have to go for solid NMR.
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