Liquid Scintillation Counting lets you measure radioactivity in samples. You stick the samples in a tube containing a “scintillation cocktail” which converts the energy given off during the radioactive decay to light that then gets converted to an electric signal by photomultiplier tubes in a scintillation counter. It’s really useful for things like studying phosphorylation (what I was doing), tracking molecules as they’re made and broken, and checking surface wipes for radioactive contamination.
Here’s a great video from The Society for Radiological Protection – “An Introduction to Liquid Scintillation Counting” https://youtu.be/krpsnXWOgcs
And some more information on scintillation cocktails from PerkinElmer: https://www.perkinelmer.com/lab-products-and-services/application-support-knowledgebase/radiometric/liquid-scintillation-cocktails.html
And some more information on radiolabeling nucleic acids: http://bit.ly/radiolabelings