two lines in acetone-d6
 

two lines in acetone-d6

We try to setup a used Bruker Avance 200 system. After frequency search we started to setup lock and shim file. Using D2O everithing worked quite well - the spectrometer find the lock and shimming leads to a 1H linewitdth less than 3Hz (10mm tube). Next step we wanted to set the files for acetone-d6. The system finds the lock, but now we see two well shaped lines separated by 0.48 ppm. Shimming does not solve this problem. We also tried acetone-d6 from a different bottle but still see two signals.

Thanks for your comments



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