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Coloured Caps for NMR

If you are using the NMR facilities in 1 South, we have changed the system for the colours of NMR tube caps.

A sample changer showing NMR tubes with different coloured caps
The 400 MHz sample changer looking colourful

How will the new system work?

In order to allow you to collect your samples and samples from your research group efficiently, each research group has been allocated a colour. This will also allow the NMR staff to return samples to laboratories if needed.


We have been able to obtain twelve different colours of NMR caps. As NMR spectroscopy is a popular technique and there are only so many colours available, we have had to mark some caps with an additional spot.

If you are a member of a group with a “spotted colour”, please draw the spots back on if they come off. If you don’t, it’s possible that your samples could get collected by the other group with the same colour.


Please don’t run samples with caps not assigned to your group, as this could result in your sample going missing. Please do continue to label your samples, so that they don’t get mixed up with samples from other group members.

Samples in J-Young tubes or pressure tubes are not impacted by this change.

Going forward

We are hoping to implement this system for our 9 West spectrometers as well. If your research group uses both the 1S and 9W spectrometers, we will endeavour to allocate you the same colour for use in both buildings.

If your research group haven’t yet collected the caps, please come to 1S 0.46. We have pens that you can use to mark your caps with spots. We will also be happy to take any caps in other colours back.


If you have any questions, please contact us.