The enhanced inertness of the new 5973 inert MSD improves analysis of trace level volatile sulfur compounds. When operated in scan or selected ion monitoring mode, excellent sensitivity, selectivity, and peak symmetry are obtained for active compounds. Eight volatile sulfur species are used to demonstrate these attributes in a variety of hydrocarbon matrices. The system is well suited for the characterization of fuel feedstocks and basic petrochemicals, where impurities can poison critical catalytic processes or affect product quality.
The document describes how the enhanced inertness of the new 5973 inert Mass Selective Detector (MSD) improves the analysis of trace level volatile sulfur compounds. It highlights that when operated in scan or selected ion monitoring (SIM) mode, the system provides excellent sensitivity and selectivity for active compounds, overcoming issues like hydrocarbon interference common with other detectors.
| Mass range | 33-100 and 12-100 amu |
|---|---|
| Scans rate | 13.1/s and 15.9/s |
| Split ratios | 1:1 up to 50:1 |
| Carrier gas | Helium |
| Constant Flow Mode | 1.9 mL/min |
| Injection source temperature | 150 °C |
| Source temperature | 230°C |
The enhanced inertness improves analysis of trace level volatile sulfur compounds and prevents adsorption from active sites.
SIM mode allows for excellent selectivity by choosing ions that have no hydrocarbon contribution, even when co-elution occurs.
A 3-mm drawout lens was used to achieve low ppb sensitivity while maintaining linearity.