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Pulsed NMR
introduction | the instrument | experiments
| specifications| prices
New Pulsed/CW NMR Designed for Teaching
The PS1-B is a 15MHz pulsed nuclear magnetic resonance spectrometer capable
of observing proton NMR with excellent signal-to-noise ratios in aqueous
solutions and organic liquids.
Using small samples (0.16mL) prepared by the student, the instrument
can be used to:
- Measure spin-lattice relaxation time using a p - p/2 pulse sequence.
- Measure spin-spin relaxation time using any of the following pulse sequences:
- Spin-echo: p/2 - p pulses.
- Carr Purcell: p/2 - p
- p - ... pulses.
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- Estimate diffusion using Meiboom-Gill sequence in a known field gradient.
- Examine the effect of chemical changes on spin-lattice and
spin-spin relaxation times by monitoring these relaxation times
for samples of epoxy or concrete as a function of curing time.
- Plot magnetic field contours in two dimensions.
- Study precession in rotating reference frames, effective fields,
off-resonance signals and free-induction decay.
- Directly measure the rotating B field during the pulse.
- Estimate signal strength.
| Representative Data |
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A spin-echo signal using the two pulse (p/2 -
p sequence) from the 0.15 ml mineral oil
standard sample supplied with each instrument.
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A Meiboom-Gill (p/2 -90° phase
shift - p - p
- p ...) pulse stream, showing multiple
echoes, using the same standard mineral oil sample. |
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Developed by faculty
with more than 60 years of accumulated experience in research and teaching in the field of magnetic resonance.
- It provides science students with a hands-on approach to learning the basic principles of pulsed nuclear magnetic resonance.
- Its modular construction allows students to experiment with each part of the apparatus separately, to determine each module's function and to interconnect the modules.
- The spectrometer is suitable for advanced laboratory experiments at the undergraduate and graduate level.
- The PS1-B uses new high-energy magnetic material to create a high-field, high-homogeneity permanent magnet.
- New solid-state technology gives it a rock-stable synthesized frequency source.
- Its unique switching and power amplifier circuits create coherent and stable pulsed radio-frequency fields.
TeachSpin has built an affordable, yet versatile pulsed NMR spectrometer that universities
and colleges can easily adapt to their science curriculum.
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