AELAB Optima-M4/M6 Sulfur Dioxide Distillation Titrator

Optima-M4/M6 sulfur dioxide distillation titrator is based on “National Food Safety Standard: Determination of Sulfur Dioxide in Food GB 5009.34-2022 and Pharmacopoeia of the People’s Republic of China Part IV General Rule 2331 Sulfur Dioxide Strong Residual Determination Method.” The system integrates heating, distillation, cooling water circulation, nitrogen purging, magnetic stirring, and acid-base titration.

Food and Chinese medicinal materials are treated by distillation, converting sulfite substances into sulfur dioxide after acid treatment. The SO₂ is absorbed by hydrogen peroxide and oxidized to sulfate ion, then measured by acid-base titration. The AELAB Optima-M4/M6 is suitable for food testing, drug production, scientific research, and routine sulfur dioxide residue determination.

⚙️ Design & Construction

The Optima-M4/M6 features integrated heating, distillation, and cooling circuits with high-efficiency far-infrared heating technology. The Four-position (Optima-M4) and Six-position (Optima-M6) heating units provide uniform heat transfer with low power consumption and no open flame. A built-in nitrogen purge system, magnetic stirring module, and corrosion-resistant exterior ensure long-term stability. The external 7-inch LCD touch screen prevents liquid splash interference and provides intuitive control.

🔬 Working Principle / Testing Method

The system distills samples after acidification, releasing sulfur dioxide which is transported by nitrogen into a hydrogen peroxide absorbing solution. Here it oxidizes to sulfate ion, which is then quantified via acid-base titration. Automated timing (0–600 minutes), nitrogen flow control (0–2 L/min), and adjustable power output allow precise replication of regulated sulfur dioxide determination methods.

💡 Key Advantages

• Automated multi-step heating, distillation, nitrogen control, and titration workflow
• High-efficiency infrared heating with real-time adjustable 0–500W power channels
• Independent control of each heating position for reproducible multi-sample processing
• Built-in liquid shortage alert and bubble filtration ensure accurate acid dosing
• Automatic nitrogen flow regulation for stable SO₂ transfer efficiency
• Maintenance-friendly external LCD panel eliminates corrosion risk
• Customizable distillation timing up to 600 minutes to meet varied test requirements

🔗 Connectivity & Integration

The Optima-M4/M6 offers external touch screen operation, internal control circuitry, and support for automated nitrogen and acid dosing processes. While no digital data export ports are specified, the LCD interface provides full operational logging and GLP-style method control.

🧠 Model Insight

🧪 Testing Applications

The AELAB Optima-M4/M6 is used for food quality inspection, herbal medicine analysis, pharmaceutical ingredient testing, production QC, and research laboratories requiring precise residual sulfur dioxide determination in compliance with national standards.

Compliance & Quality Assurance

The system supports standardized sulfur dioxide determination methods in line with GB 5009.34-2022 and general pharmaceutical test procedures. Each instrument undergoes AELAB quality control, ensuring stability, repeatability <1%, and traceable calibration integrity.