Specialty Gas SO₂

Specialty Gas SO₂ — certified SO₂ for analysis and calibration

Specialty Gas SO₂ from REAL GAZ covers high-purity sulfur dioxide and certified SO₂ mixtures in nitrogen or air for measurement and research.
Concentrations from low ppm to percent level can be blended gravimetrically and verified analytically.

Mixtures are prepared according to ISO 6142, verified following ISO 6143 and documented under ISO 17025 principles, with passivated cylinders for stability and traceability.

🏭 Where Specialty SO₂ Is Used

🌫️ Emission monitoring — calibrate CEMS analysers at power plants, incinerators and smelters;
🌍 Ambient air stations — span checks of UV-fluorescence SO₂ monitors;
⚗️ Catalyst testing — feed mixtures for sulfur-poisoning studies on automotive and industrial catalysts;
🔭 Atmospheric research — reference standards for trace-gas and acid-rain studies.

💡 Why Choose REAL GAZ

✅ Stable mixtures — treated cylinder walls reduce adsorption of SO₂ at low ppm;
🧪 Tight tolerances — blend accuracy is chosen to suit your analyser and QA plan;
🎯 Balance gas choice — nitrogen, synthetic air or custom matrices on request;
🔒 Shelf-life guidance — stated stability helps you plan recalibration;
📄 Certificate of Analysis (CoA) — supplied with every order.

🔬 Quality Control & Safety

passivation and vacuum cleaning of cylinders;
weighed gravimetric preparation;
comparison against reference standards;
stability and leak checks.

Cylinders comply with ADR / UN transport rules and relevant EN/ISO standards.

📦 Mixtures, Matrices & Stability

SO₂ is reactive and adsorbs on untreated surfaces, so low-concentration mixtures need cylinders with a passivated interior and a conditioned valve. REAL GAZ prepares mixtures in nitrogen, synthetic air or other balance gases, and we can add companion components when a method needs a multi-component standard.

Typical ranges run from a few ppm for ambient monitoring to several hundred ppm for stack analysers and to percent level for process checks. Use stainless steel or PTFE-lined sampling lines and a purged regulator to avoid response lag. Each certificate states the nominal concentration, tolerance, uncertainty, preparation date and recommended use-by date. Re-analysis and re-certification can be arranged for long-term programmes.

Before connecting a certified standard to an analyser, check that the pressure rating of the regulator matches the cylinder and that the delivery pressure suits the instrument. Bleed the line until readings are stable, record the response and compare it with the certificate so that any drift in the analyser is clearly identified rather than mistaken for a change in the gas. Keep a log of every calibration, including ambient temperature and the analyser serial number, because trends in this record reveal sensor ageing long before a failed audit does.

⚙️ Trusted Gas Solutions

REAL GAZ offers Specialty Gas SO₂ to environmental laboratories, power utilities and research institutes across Azerbaijan, Turkey, Georgia, Uzbekistan and the USA, with advice on suitable regulators and sampling lines for low-ppm work.

REAL GAZ — Certified SO₂ where precision is the point.