SULFUR ISOTOPE FRACTIONATION BY SALMONELLA SPECIES

Abstract
A number of Salmonella species are capable of fractionating sulfur isotopes during sulfite reduction under aerobic and anaerobic conditions. The product H2S may be enriched in 32S by over 3% as compared to the initial sulfite 32S/34S composition. This is significantly higher than the isotope effect realized in the equivalent inorganic chemical reduction.