δ(¹⁸O/¹⁶O) Determinations in Water Using Inductively Coupled Plasma-Tandem Mass Spectrometry.

ABSTRACT: A fully validated measurement approach for the determination of oxygen isotope ratios in water using inductively coupled plasma-tandem mass spectrometry (ICP-MS/MS) is described for the first time. Deuterium was used as a reaction gas to mass-shift the oxygen isotopes to the OD₃⁺ product ion, allowing for the removal of polyatomic ions (¹⁶O¹H⁺ and ¹⁶O¹H₂⁺) generated in the plasma that interfere on the less abundant oxygen stable isotopes (¹⁷O and ¹⁸O). The developed methodology was validated for δ_VSMOW-SLAP(¹⁸O/¹⁶O) determinations using four internationally recognized IAEA reference materials, as well as 11 in-house laboratory isotope ref

SUBMITTER: Lancaster ST 

PROVIDER: S-EPMC12489894 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature