Hello ,
because we had similar problems with the "official Bruker Methanol sample
" on a cryoprobe (i.e. radation damping and some cryptic signam splitting
near 330 K , may be due to boiling of the sample in the degassed sample
with low pressure) we produced our own sample (methanole-d4).
Wit a PT-100-element we measured the "real" temparture with in a (similar)
NMR tube located in the magnet and got a "reference curve"
(Methanole-splitting vs. PT-100 temperature) with can be well fitted by
square function.
To the next annual GDCh-meeting (Tübing in Sept.) we want to present these
short results on a poster.
--
Matthias Findeisen; Univ. Leipzig, Inst. Analyt.Chemie
Received on Thu Jun 08 2006 - 08:33:38 MST