Unfinished - NMR Spectroscopy Flashcards Preview

Pharmacy Year 2 Semester 1 > Unfinished - NMR Spectroscopy > Flashcards

Flashcards in Unfinished - NMR Spectroscopy Deck (6):
1

What is NMR based on?

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

2

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

-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

3

What does NMR measure?

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

4

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

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

5

When will a sample generate a signal? Where?

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

6

Resonance conditions equation

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