AELAB Sulfur Dioxide Distillation Titrator Optima M4/M6 – Accurate SO₂ Residue Testing

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 Provided assay design. Integrating the functions of heating, distillation, cooling water circulation, nitrogen purging, magnetic stirring and acid-base titration, the food and Chinese medicinal materials are treated by distillation and the sulfite series substances in the sample are converted into sulfur dioxide after acid treatment. It is brought into the absorbing bottle containing hydrogen peroxide with nitrogen flow and the hydrogen peroxide oxidizesit to

sufate ion. It is measured by acid-base titration to calculate the residual amount of sulfur dioxide in food or medicine and decoction pieces. The instrument is mainly suitable for all kinds of food testing, drug testing, drug production enterprises, scientific research institutes, and food production enterprises related to sulfur fumigation, for the routine determination of sulfur dioxide residues.

TECHNICAL CHARACTERISTICS

Unattended

The system automatically completes the steps of heating, distillation, temperature control, cooling water circulation, distillation end point identification and stirring.

Heating module

Adopt advanced far-infrared ceramic radiation heating technology, no open flame, low power consumption, high efficiency, long life, uniform heating, not easy to bump, corrosion resistance. The heating components can be controlled separately without interfering with each other.

Cold water circulation module

External cooling water: external cooling circulating water machine, easy to operate and flexible to use.

Receiving liquid anti-suck back When the receiving liquid reaches the set end point, nitrogen gas will not be automatically turned off, effectively preventing the receiving liquid from backsucking.

Receiving mode

Timed distillation :(0-600) minutes can be arbitrarily set, according to the set time, the distillation will automatically stop.

Intelligent human-computer interaction

There are six built-in distillation methods in the distillation apparatus, which can be directly selected without frequent input of repeated data. The method can also be customized and saved according to the experimental requirements.

Nitrogen control system

Automatically. control the opening of nitrogen, without manual operation, the instrument has a built-in flow control device, which can accurately adjust the nitrogen flow, and can also be connected to the nitrogen generator for use.

Built-in magnetic stirring

Built-in magnetic stirring function, through the screen control, you can turn on all magnetic stirring or single- channel magnetic stirring, and control the magnetic stirring speed.

External LCD touch screen

The display is placed outside the body of the instrument, which is easy to take and can effectively prevent the spilled liquid from corroding the display screen.

Automatic acid addition

Accurate quantitative acid addition, full response, and reduce errors.

🔬 How It Works?

The Optima M4/M6 titrator automates sulfur dioxide residue detection by combining distillation and acid-base titration. Samples undergo acid treatment, converting sulfite substances into sulfur dioxide, which is distilled and absorbed in hydrogen peroxide with nitrogen flow. The sulfur dioxide is oxidized to sulfate ions and quantified via titration, yielding accurate residual sulfur dioxide content in food or medicinal products.

💡 Advantages

• Fully automated with unattended operation, reducing user error and workload

• Advanced far-infrared ceramic heating offers uniform, efficient, flame-free heating

• Accurate nitrogen flow control with automatic purging prevents sample contamination

• Customizable distillation programs with six built-in methods plus user-defined options

• High precision automatic acid addition improves repeatability and reduces manual errors

• External LCD touch screen ensures easy operation and protection from corrosion

🔍 Recommended Models by Use Case

• Optima M4: Ideal for medium-capacity food testing labs and pharmaceutical QC departments

• Optima M6: Suited for large-scale research institutes and production facilities requiring higher throughput

🧪 Ideal For

• Food safety testing laboratories

• Pharmaceutical manufacturing and quality control

• Scientific research centers analyzing sulfur dioxide residues

• Food production companies monitoring sulfur fumigation levels

• Chinese medicine decoction and residue analysis