Nitrogen - Experis ultra-high purity gases Technical specification

Significance of the Topic

Ultra-high purity nitrogen is a cornerstone in modern analytical chemistry and industrial process control. Its exceptionally low levels of oxygen, moisture, hydrocarbons and other critical impurities ensure reliable performance in gas chromatography, detector systems and sensitive instrumentation. Consistent and traceable gas quality contributes to reduced background noise, extended column life and more accurate quantification at trace levels.

Objectives and Overview

This technical specification outlines the range of Experis® ultra-high purity nitrogen grades offered by Air Products. The document aims to present grade definitions, impurity limits, physical properties, packaging options and recommended control equipment. It guides users in selecting the optimal nitrogen grade for applications in chemical analysis, pharmaceutical manufacturing and process monitoring.

Methodology and Instrumentation

Analytical verification is performed under an ISO 9001:2008 accredited Quality Management System. Grades are confirmed by statistical batch analysis or individual cylinder analysis, with pharmaceutical grades meeting European, US and Japanese pharmacopeia monographs. Key impurity measurements – oxygen, water, CO + CO₂, total hydrocarbons, NOx and SO₂ – are determined using trace gas analyzers following industry-standard methods.

Used Instrumentation

Recommended control equipment ensures safe and stable delivery of UHP nitrogen from cylinders to the point of use. Options include:

• Two-stage high purity brass regulators (models R300, R500)
• Single-stage high purity brass regulator (model R400)
• High-purity cylinder manifolds: single wing (M1000), manual two-wing changeover (M2000) and automatic two-wing changeover (M3000)

Key Results and Discussion

The Experis nitrogen portfolio covers six grades:

• Technical (5.0): 99.999% purity
• Premier (5.2) and Pharma (5.2): 99.9992% purity with batch or pharmacopeial certification
• BIP® (6.0) and BIP ECD (6.0): 99.9999% purity tailored for low-level hydrocarbon and ECD detector use
• BIP® Plus (6.8): 99.99998% purity with individual cylinder analysis

Typical impurity levels include oxygen < 0.01 ppm in the highest grades, water < 0.02 ppm, CO + CO₂ < 0.5 ppm and total hydrocarbons < 0.1 ppm. Physical properties such as molecular weight (28.01 g/mol), boiling point (–195.8 °C) and gas density (1.168 g/L at 20 °C) are consistent across grades. Packaging options range from small x2A cylinders to bulk 12×50 s packs, supporting diverse laboratory and production demands.

Benefits and Practical Applications

Adopting Experis UHP nitrogen yields multiple advantages:

• Elimination of inline purifiers reduces capital and maintenance costs, downtime and waste disposal requirements
• Lower baseline noise and extended GC column life, driving down operating expenses and improving detection limits
• Comprehensive certification and lot traceability enhance quality assurance in regulated environments
• Wide selection of cylinder sizes and delivery pressures supports both analytical laboratories and high-volume industrial sites

Future Trends and Opportunities

Emerging developments are expected to further refine gas purity and supply chain transparency. Digital monitoring of cylinder pressure and remaining volume can optimize usage and prevent downtime. Advanced purification technologies may push impurity limits into the sub-parts-per-trillion range. Sustainable packaging and reduced carbon footprint in gas production and transport are poised to become key differentiators.

Conclusion

Air Products’ Experis ultra-high purity nitrogen range delivers verifiable, consistent gas quality for critical analytical and industrial applications. With certified impurity specifications, robust quality management and a full complement of delivery and control options, users can achieve more reliable results, lower operating costs and improved compliance.

Reference

No external literature references were provided in the source document.