Experis Gas Mixtures

Significance of the Topic

The accurate and stable calibration of analytical instruments is fundamental in ensuring reliable measurements across industries such as environmental monitoring, automotive emissions testing, pharmaceuticals and petrochemicals.

Objectives and Study Overview

This document reviews the characteristics of Experis® calibration and process gas mixtures developed by Air Products, focusing on four core principles: accuracy, stability, traceability and overall reliability. It aims to outline the product range, technical approach, quality assurance measures and application domains.

Methodology and Instrumentation

Gas mixtures are prepared gravimetrically using ultra high purity raw gases. The process employs:

• State of the art filling facilities with automated gravimetric weighing systems
• Specialized cylinder surface treatments to minimise adsorption and reactivity
• Analytical verification of components via high precision instrumentation
• ISO 17025 accredited procedures for certification and quality control

Main Findings and Discussion

Air Products demonstrates market-leading performance in:

• Accuracy: component uncertainties calculated individually, with expanded uncertainty levels down to ±0.05 %
• Stability: confirmed shelf lives exceeding ten years for most mixtures and up to three years for ultra-trace reactive blends at parts per billion levels
• Traceability: unbroken calibration chains to primary national standards and ISO 17025 certified reference materials
• Reliability: evidence from proficiency tests and raw material inventories to ensure batch-to-batch consistency

Benefits and Practical Applications

• Reduced inventory costs and cylinder changeovers through extended shelf life
• Simplified compliance with legislative and quality assurance standards (e.g. EN14181 QAL3)
• Enhanced measurement comparability within and across laboratories worldwide
• Applicability in diverse sectors including environmental control, engine testing, gas appliance certification, forensic analysis and industrial QA/QC

Future Trends and Potential Applications

Emerging developments likely to influence the field include:

• On-site and on-demand gas mixture generation using modular microfluidic blending systems
• Digital certification and integration with laboratory information management systems for real-time traceability
• Advanced surface coatings and materials to expand shelf life for highly reactive species
• Multi-component mixtures targeting next-generation detectors and microanalytical platforms

Conclusion

Experis® gas mixtures by Air Products provide a comprehensive solution for precise calibration and process control. By combining gravimetric preparation, advanced cylinder technologies and rigorous accreditation, they deliver confidence in measurement accuracy, long-term stability and full traceability, serving the exacting needs of modern analytical laboratories and industrial applications.

References

No external references cited in the source document.