This report outlines preliminary methodology and results for the analysis of four samples for all three isotopes of sulfur in carbonate matrices using the 7500ce Octopole Reaction System (ORS) with xenon as the cell gas. Xenon was used to react with oxygen in order to attenuate the O2-derived polyatomic interferences at masses 32, 33, and 34. Consequently, each sulfur isotope was analyzed on-mass, leading to highly reproducible results.
This document outlines a methodology for determining carbonate associated sulfur (CAS) levels in seawater and pore water samples using the Agilent 7500ce Octopole Reaction System (ORS) ICP-MS. The study focuses on analyzing the three isotopes of sulfur (masses 32, 33, and 34) in carbonate matrices.
| Forward power | 1500 W |
|---|---|
| Plasma gas flow | 15.0 L/min |
| Auxiliary gas flow | 1.0 L/min |
| Nebulizer gas flow | 0.80 L/min |
| Makeup gas flow | 0.20 L/min |
| Sampling depth | 8.0mm |
| Spray chamber temperature | 2°C |
| Xe cell gas flow | 0.25 mL/min |
Xenon is used as a reaction gas to react with oxygen, attenuating oxygen-derived polyatomic interferences at masses 32, 33, and 34.
Xenon is added as a cell gas to react with oxygen and attenuate interference species.
The detection limit is 0.33 ppb for 32S and 1.7 ppb for 34S.
The sampling depth is set to 8.0mm.