Application of Mc-Icp-Ms Method for Sulfur Isotopic Analysis in Reservoir Rocks

Summary We have developed a technique for determination of 34S/32S isotopic ratio in pyrite using multiple-collector inductively coupled plasma mass-spectrometer NEPTUNE PLUS equipped with J-interface and desolvating nebulizer sample injection system (Aridus II). This configuration of the NEPTUNE PLUS, as well as a high-resolution mode, made it possible to significantly reduce (>10000 times) major isobaric interferences by 32 mass from O2+. For mass bias correction, standard-sample bracketing was applied.