Chemistry & Biochemistry

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Department of Chemistry & Biochemistry
College of Natural and Social Sciences

Biological Science room 336 | (323) 343-2300 (fax-(323) 343-6490)

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NMR Policy


Because of high magnet field, absolutely NO ADMISION to the
NMR rooms for people with a Pacemaker or metallic implant .

  1. The door to the NMR (300 MHZ) room (721) always should stay OPEN while there are people in that room.
  2. Do not bring any magnetic materials tools or equipment in the proximity (orange line) of the NMR magnet. The NMR magnetic fields may permanently damage watches, calculators and certain types of credit cards. The attractive forces could also move the object uncontrollably toward the magnet and might damage the magnets/probes or might even cause the magnet to quench. Magnet quench is the event that quickly vaporizes the liquid Helium, emptying the magnet in a matter of few minutes. Be aware that there could be a risk of asphyxiation in a confined space when a magnet quenches.
  3. It is imperative that everyone (user/technician) signs the logbook when working with the NMR machine (regardless of the nature of work). Please try to provide all the information in the logbook.
  4. Always assume that there is a sample inside the magnet. Therefore, first lift the air and then increase the airflow to the max to ensure that there is no sample inside the magnet. You should be able to hear and feel the air from the top of the magnet. Remember to give it enough time for the sample to be ejected. In case you still don’t see any sample coming up, for final assurance, you should perform a gentle cavity search from top of the magnet using your finger.
  5. Once done with your experiments place the reference sample inside the magnet and lock on the deuterium signal (Acetone-D6). This will help to maintain the field adjustment with respect to the lock signal thus making it easier for the next person to locate the lock signal.

 NMR - Nuclear Magnetic Resonance

No service or repairs are to be performed until a Request for NMR Service form has been submitted. (If there are any questions, you can email the technician directly) The form will be approved by the technician supervisor. The NMR specialist will complete the bottom portion of the form indicating the problem and when the repair/service was completed. This will provide a record of repairs/service that will be useful in maintaining the operational integrity of the spectrometers.

Effective cooperation with the NMR technicians will speed up

Duties of the departmental NMR Specialist are:

  • Daily operation/oversight of all departmental NMR spectrometers
  • Training of all personnel-including students, faculty, and staff-in the correct operation of all departmental NMR spectrometers
  • Monitoring of NMR use by research groups and laboratory classes
  • Assessment of any repairs or service required for NMR spectrometers
  • All operational and software service will be handled by NMR specialist
  • Any hardware/electronic component repairs will be assigned to an electronics technician following consultation with the technician supervisor
  • Interact with electronic technicians effectively to maximize up-time for NMR spectrometers