ท่อ Sulfinert®: นวัตกรรมที่นักวิศวกรรมเครื่องมือวัดเลือกใช้

Sulfinert® tubing (also known by its product name Siltek®) is not just an ordinary stainless-steel tube. It is engineered specifically for applications requiring ultra-clean surfaces for reactive gas analysis. By applying an inert coating to the internal surface of the tube, Sulfinert® prevents chemical adsorption and unwanted reactions, particularly when measuring compounds in trace-level concentrations (ppb to ppm).

This coating is essential when dealing with reactive gases that are prone to interact with untreated stainless steel tubing, leading to measurement errors. Sulfinert technology ensures stable and reliable performance, particularly in systems such as Gas Chromatography (GC) and Continuous Emission Monitoring Systems (CEMS), which are used in VOC analysis.

 Types of Compounds That Require Sulfinert® Tubing

1.  Sulfur Compounds
   - H₂S (Hydrogen Sulfide)—Highly reactive and easily adsorbed onto metal surfaces, even within seconds
   - COS (Carbonyl Sulfide)—Used in various industries, very sensitive to adsorption
   - CS₂ (Carbon Disulfide)—Volatile and reactive with metal
   -  Mercaptans (R-SH)—Naturally occurring odorants that tend to adhere to metal surfaces  Sulfinert® tubing has been shown to reduce sulfur compound loss by over 90% compared to untreated stainless steel
   
2.  Nitrogen Compounds & Acidic Gases
   - NH₃ (Ammonia)—Highly reactive, difficult to measure accurately in untreated systems
   -  NO, NO₂, etc.—Important in Air Quality Monitoring
   -  Amines—Reactive with stainless steel surfaces
   
3.  High-Adsorption Oxygenates
   - H₂O₂ (Hydrogen Peroxide)
   - O₃ ( Ozone)
   - Various organic and inorganic acids
   
4.  Various organic and inorganic acids
   - Tertiary Butyl Alcohol (TBA)
   - Methanol, Ethanol—Common in fuels and food-grade applications
   
5.  Volatile Organic Compounds (VOCs)
   - BTEX (เบนซีน, โทลูอีน, เอทิลเบนซีน, ไซลีน)
   - Hydrocarbons with halogen - สารมลพิษในโรงงานอุตสาหกรรมที่ต้องวิเคราะห์อย่างแม่นยำ
   

The Importance of Using Sulfinert® Tubing in Reactive Compound Analysis Systems

1.  Accurate Analysis at ppb Levels
       Accuracy is critical in trace-level analysis (ppb to ppm), as even minor adsorption losses can have a significant impact on results. Sulfinert® reduces such losses by eliminating adsorption on the tube's surface. It enables the reliable detection of highly reactive gases and improves measurement accuracy by up to ten times that of untreated tubing
   
2.  Prevention of Structural Changes
       Catalysts or reactive surfaces inside untreated tubing might affect the chemical structure of sample gases, producing incorrect results. Sulfinert® inhibits unwanted reactions, maintaining the analyzed compound's real composition.
   
3.  Increased Sensitivity for Reactive Gases
       Reactive compounds such as hydrogen sulfide (H₂S) or ammonia (NH₃) can degrade and lose integrity within standard tubing. Sulfinert® ensures that these sensitive compounds remain intact, allowing accurate analysis via instruments like Gas Chromatographs (GC), Continuous Emission Monitoring Systems (CEMS), or Mass
   Spectrometers.
   
4.  Improved Data Reliability
       In environments where data precision is essential—such as in petrochemical, pharmaceutical, or regulatory monitoring—Sulfinert® helps ensure data reliability by minimizing surface interaction and sample distortion, aligning with modern industrial quality standards
   
5.  Extended Equipment Lifespan
       Sulfinert®-coated tubing maintains high performance for 3–5 years, reducing the frequency of cleaning or replacement and minimizing contamination-related risks. It offers long-term value for high-precision instruments.
   

 Industrial Applications of Sulfinert®

• VOC and toxic gas monitoring in air and emission systems
• Sulfur compound testing in fuels, exhaust, and industrial processes
• Cleanroom and ultra-pure gas distribution
• Semiconductor industry—trace-level contaminant detection
• CEMS systems for real-time emission compliance
  

 Sulfinert® is ideal when ultra-precise measurement, long-term reliability, and ultra-low adsorption are required.

Conclusion: Precision Isn't Optional—It's Essential
While accuracy can often be taken for granted, for trace-level reactive gas analysis, Sulfinert® isn't just a "better" option—it's often the only reliable one. For engineers, chemists, or quality professionals who demand trusted, stable, high-performance measurement in all conditions, Sulfinert® remains the go-to choice

Contact Us for Expert Advice or Product Inquiries If you need consultation or would like to request a quote for Sulfinert® tubing or related gas sampling solutions, our specialists
are ready to help:
Website: https://www.ase-thai.com
Line: @ase-thai
Email: sales@ase-thai.com
Tel: 083 298 9222