High Automation of Thermo Scientific FlashSmart CHN/O Analyzer using the MultiValve Control (MVC) Module

Importance of the topic

The precise and automated measurement of carbon, hydrogen, nitrogen and oxygen in organic and inorganic matrices is critical for quality control, research and regulatory compliance across pharmaceutical, materials and chemical industries. High-throughput elemental analysis with low operational costs and minimal user intervention enhances laboratory productivity and data reproducibility.

Goals and study overview

This study evaluates the integration of the MultiValve Control (MVC) Module with the Thermo Scientific FlashSmart Elemental Analyzer for sequential CHN combustion and oxygen pyrolysis determinations. Key objectives include assessing switching speed between configurations, gas consumption, stability, repeatability and accuracy over extended unattended operation.

Methodology and used instrumentation

The analyzer features two independent furnaces: a left furnace for dynamic flash combustion of tin-encapsulated samples under oxygen flow, and a right furnace for pyrolysis of silver-sealed samples to generate CO for oxygen quantification. Gaseous products are separated by GC and detected via thermal conductivity detectors. The MVC Module automatically reconfigures pneumatic and gas lines, switching between helium carrier and standby nitrogen or argon to reduce inert gas use. Samples are loaded by dual MAS Plus autosamplers under control of EagerSmart Data Handling Software.

Main results and discussion

• Configuration switching achieved stable analysis readiness within ten minutes, enabling alternating CHN and oxygen runs over 40 days without manual intervention.
• Repeatability for CHN standards yielded RSDs below 1% for nitrogen, carbon and hydrogen; oxygen RSDs remained below 0.5% across >200 analyses.
• Linearity and accuracy tests with a range of pure organic and high-element standards confirmed results within specified tolerance ranges for all analytes.
• Helium consumption was significantly reduced by automated standby gas switching, lowering operational costs.

Benefits and practical applications

The FlashSmart Analyzer coupled with MVC Module provides:

• Fully unattended dual-mode CHN/O analysis without manual valve or gas changes.
• High throughput with consistent performance and minimal maintenance.
• Lower carrier gas usage and cost savings through automated standby protocols.
• Flexible application to multi-element workflows (e.g., CHNS/O, CHN/S) by simple consumable changes.

Future trends and opportunities

Advances may include integration of real-time data analytics and AI-driven diagnostics for predictive maintenance, expansion to additional elements (sulfur, halogens) or coupling with hyphenated techniques such as GC-MS. Enhanced remote operation and cloud-based reporting will further streamline laboratory workflows and compliance documentation.

Conclusion

The MVC Module significantly enhances the FlashSmart Analyzer by automating gas and reactor switching, reducing gas consumption and delivering robust accuracy and precision for CHN and oxygen analyses in a single platform. This all-in-one solution supports high sample throughput and unattended operation, making it ideal for diverse analytical laboratories.

Used Instrumentation

• Thermo Scientific FlashSmart Elemental Analyzer with two independent furnaces
• Thermo Scientific MultiValve Control Module
• MAS Plus Autosamplers
• EagerSmart Data Handling Software
• Thermal Conductivity Detectors and GC columns