NMR Safety Powerful magnets

NMR Safety 2 NMR Safety Information. UMBC Dept. of Chemistry and Biochemistry. Accessed 7 Jan Magnetic strength is described in Tesla or Gauss (1 T = 10,000 G) Earth’s magnetic field 0.6 Gauss at equator Refrigerator magnet Gauss MRI medical scanners Tesla (3 - 15,000 G) High field NMR magnet 200 MHz 4.7 Tesla (47,000 G) 300 MHz 7.0 Tesla (70,000 G) 500 MHz 11.7 Tesla (117,000 G) 800 MHz 18.8 Tesla (181,000 G) A superconducting magnet is always on!

NMR Safety 3 NMR Safety Information. UMBC Dept. of Chemistry and Biochemistry. Accessed 7 Jan NMR safety. Columbia University, Chemistry Department. Accessed 7 Jan The magnetic field strength of a superconducting magnet decreases with increasing distance. Signs, chains, or tape on the floor indicate the approximate location of the 5 Gauss line around the magnet. Do not enter the NMR lab if you have medical implants such as a pacemaker Ferromagnetic items are attracted to the magnet. To be safe, assume all metal objects are ferromagnetic. – Jewelry, watches, tools, paper clips, staples, etc. Devices with magnetic strips can be damaged – Credit cards, mobile phones, ipods

Other Safety Considerations 4 NMR Safety Information. UMBC Dept. of Chemistry and Biochemistry. Accessed 7 Jan NMR safety. Columbia University, Chemistry Department. Accessed 7 Jan Carefully insert and remove tubes from spinners Do not use chipped NMR tubes Injury from broken NMR tubes Prolonged contact with liquid helium or nitrogen can cause frostbite Buildup of gases can cause asphyxiation Cryogenic liquids and gases Be careful to not lose your balance Do not hurry Falling off platform used to insert sample

Superconducting Magnet Safety A video. hiHnNwQ 5 NMR safety. Columbia University, Chemistry Department. Accessed 7 Jan