UW CHEMISTRY NMR

So far, we have been asking users to switch the RF cable at the Probehead, depending on whether you run a 13C or 19F observation.   Many a time, a slip in this step leads to ‘zero signal’ since you might be pulsing along the wrong Channel.

Now, this problem is gone once and for all with the following home-made upgrade.  The attached picture should say it all.    

AFTER you select your 13C or 19F experiment and BEFORE you run the ‘wobb’ command, make sure that the dial is pointing towards the correct nucleus.  If not, you just need to do the following sequence of actions with the black knob :

• PULL

• TURN

• PUSH

That’s it !  Now you are ready to scan the nucleus of your choice.

WARNING !!!   NEVER TURN/MANIPULATE THE KNOB, WHEN  AN ACQUISITION (ZG) IS IN PROGRESS !!

If you have doubts, please clear them first.

NMR Facility Manager

6/3/2019