Agilent 355 Sulfur Chemiluminescence Detector (355 SCD): Separation of Carbonyl Sulfide and Hydrogen Sulfide
Applications | 2007 | Agilent TechnologiesInstrumentation
Trace-level analysis of carbonyl sulfide (COS) amid high hydrogen sulfide (H2S) backgrounds is crucial for gas quality assessment, environmental control and sulfur recovery processes.
This overview describes the use of the Agilent 355 Sulfur Chemiluminescence Detector coupled with a J&W GasPro silica-PLOT column to resolve trace COS in the presence of significantly higher H2S levels, demonstrated in a propylene matrix.
Sample introduction is performed via splitless injection of 1 mL onto a 15 meter J&W GasPro column under isothermal conditions at 50 degrees Celsius with a 5 psig head pressure. The SCD operates at standard chemiluminescence detection settings to selectively monitor sulfur compounds.
Baseline separation of 100 ppm COS from 500 ppm H2S was achieved without cryogenic cooling. COS elutes prior to H2S, overcoming boiling point ordering challenges on conventional silicone columns. The outcome confirms reliable quantification of trace COS in matrices with H2S to COS ratios exceeding 100 to 500.
Advancements may include miniaturized SCD modules for field deployment, integration with mass spectrometry for multidimensional analysis, and automated online monitoring systems for continuous process control.
The combination of the Agilent 355 SCD and J&W GasPro silica-PLOT column offers an effective, noncryogenic strategy for selective detection of COS against high H2S backgrounds, enhancing analytical capabilities in sulfur gas monitoring.
Agilent Technologies Technical Brief 5989-6784EN, June 2007
GC
IndustriesEnergy & Chemicals
ManufacturerAgilent Technologies
Summary
Significance of the Topic
Trace-level analysis of carbonyl sulfide (COS) amid high hydrogen sulfide (H2S) backgrounds is crucial for gas quality assessment, environmental control and sulfur recovery processes.
Objectives and Overview
This overview describes the use of the Agilent 355 Sulfur Chemiluminescence Detector coupled with a J&W GasPro silica-PLOT column to resolve trace COS in the presence of significantly higher H2S levels, demonstrated in a propylene matrix.
Methodology
Sample introduction is performed via splitless injection of 1 mL onto a 15 meter J&W GasPro column under isothermal conditions at 50 degrees Celsius with a 5 psig head pressure. The SCD operates at standard chemiluminescence detection settings to selectively monitor sulfur compounds.
Instrumentation Used
- Agilent 355 Sulfur Chemiluminescence Detector
- Gas chromatograph equipped for splitless injection
- J&W GasPro 0.32 mm i.d. silica-PLOT column, 15 m length
Main Results and Discussion
Baseline separation of 100 ppm COS from 500 ppm H2S was achieved without cryogenic cooling. COS elutes prior to H2S, overcoming boiling point ordering challenges on conventional silicone columns. The outcome confirms reliable quantification of trace COS in matrices with H2S to COS ratios exceeding 100 to 500.
Benefits and Practical Applications
- Elimination of cryogenic cooling simplifies operation and reduces cost
- High selectivity and sensitivity for COS detection in complex gas streams
- Applicable to natural gas analysis, process monitoring, and QA QC in sulfur recovery
Future Trends and Opportunities
Advancements may include miniaturized SCD modules for field deployment, integration with mass spectrometry for multidimensional analysis, and automated online monitoring systems for continuous process control.
Conclusion
The combination of the Agilent 355 SCD and J&W GasPro silica-PLOT column offers an effective, noncryogenic strategy for selective detection of COS against high H2S backgrounds, enhancing analytical capabilities in sulfur gas monitoring.
Reference
Agilent Technologies Technical Brief 5989-6784EN, June 2007
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