In a recent study published in Metallomics, a team of scientists characterized the composition of potassium isotope ratios (δ 41 K) in the serum samples obtained from Alzheimer's disease patients ...

Potassium or uranium isotopes which have much longer half-lives, are used to date very ancient geological events that have to be measured in millions or billions of years.

Interestingly, humans are more radioactive than bananas due to naturally occurring potassium in our bodies. Several other foods also contain radioactive isotopes, but their levels are safe for ...

They then analyzed the solutions with a mass spectrometer to measure the various isotopes of both potassium and rubidium in each sample. Determining the isotopes presence was essential.