Difference between revisions of "NMR from an Instrument point of view"

From apimba
Jump to navigation Jump to search
Line 20: Line 20:
 
This sample is then placed into the magnet which has what is called a probe in it. This probe contains the antennas for the transmitter and receiver.
 
This sample is then placed into the magnet which has what is called a probe in it. This probe contains the antennas for the transmitter and receiver.
  
[[file:probe.png|400px]]
+
[[file:probe.jpg|400px]]
  
 
==Detector==
 
==Detector==

Revision as of 01:47, 27 May 2020

This section focuses on the NMR instrument. All instruments have three basic components: a signal generator, a sample holder and a detector.

For NMR:

  • signal generator - radio
  • sample holder - such as an NMR tube in a spinner.
  • detector - antenna

An NMR instrument has a fourth component, a magnet, that is used to put the sample into an excited state. This excited state is then probed with the signal generator and the result detected with the detector. An instrument with a superconducting magnet is shown below. These systems can be very expensive, in the millions of dollars for the best ones. Due to the high technology required there are only a few manufacturers. The instrument pictured is about 8 feet tall.

NMR Magnet and the probesmall.jpg

Signal Generator

Sample Holder

For solution NMR, a normal sample consists of about 0.75ml placed into an NMR tube:

NMR tube.jpg

This sample is then placed into the magnet which has what is called a probe in it. This probe contains the antennas for the transmitter and receiver.

Probe.jpg

Detector

List of topics in this section

  1. manufacturers
  2. NMR probe suppliers
  3. NMR consumables suppliers