Dr David Murphy et al (PBSF010) explored the use of strontium isotopes as markers of provenance for biosecurity purposes. The work showed some potential and certainly added to our knowledge base. David and his colleagues have now published the work: Murphy DT, Allen CM, Ghidan O, et al. Analysing Sr isotopes in low-Sr samples such as single insects with inductively couple plasma tandem mass spectrometry using N2O as a reaction gas for in-line Rb separation. Rapid Commun Mass Spectrom. 2020;34:e8604. https://doi.rog/10.1002/rcm.8604 – see the Project page for more detail.