Unfinished - NMR Spectroscopy

Question 1

What is NMR based on?

Answer 1

NMR (Nuclear magnetic resonance) is based on the magnetic properties of particular types of nuclei when placed into an external magnetic field

Question 2

Name the two types of NMR with their frequency ranges and what they are used for

Answer 2

-Magnetic Resonance Imaging - MRI
50-300MHz frequency
For diagnostic imaging of soft tissues (Water detection)

-NMR Spectroscopy
300-900MHz frequency
Primarily used for compound ID and characterisation

Question 3

What does NMR measure?

Answer 3

The absorption of radio-frequency radiation resulting in changes in nuclear spin orientation

Question 4

What conditions must there be in order for NMR to occur? What is detected?

Answer 4

NMR only occurs when a sample is in a strong magnetic field
Different nuclei absorb EMR at different frequencies
In an NMR experiment you detect relaxation back to equilibrium

Question 5

When will a sample generate a signal? Where?

Answer 5

The sample will only generate a signal at a particular combination of radio frequency and magnetic field strong enough to satisfy resonance conditions

Question 6

Resonance conditions equation

Answer 6

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