Alkaline persulfate oxidation as an intermediate step for the development of a wet chemical oxidation interface for compound-specific δ¹⁵N analysis by LC-IRMS.

ABSTRACT: For the measurement of compound-specific isotope ratios by liquid chromatography isotope ratio mass spectrometry (LC-IRMS), complete mineralization of organic compounds to a single species of measurement gas is required so that isotopic fractionation can be minimized and corrected by identical treatment with standards. The established use of peroxydisulfate in an acidic environment has its limitations, especially when it comes to the complete oxidation of nitrogen-containing compounds with aromatic ring systems. Under acidic oxidation conditions, ammonium and nitrate were identified as the main nitrogen containing mineralization products of the oxidation of different model compounds. In contrast to the oxidation in an acidic environment, alkaline peroxydisulfate oxidation leads to nitrate

SUBMITTER: Koster D 

PROVIDER: S-EPMC11961470 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature