Specialized instruments supporting the new national standard for food sulfur dioxide (sulfur dioxide testing in traditional Chinese medicine using the Chinese Pharmacopoeia method): the ST109A, ST109B1, ST109C, and ST109D series are all equipped as standard with automatic reagent addition and automatic nitrogen blowing control functions (a national first)!!!

R&D Background:

      With the release of the new national standard GB5009.34-2022 Determination of Sulfur Dioxide in Foods, the methods for determining sulfur dioxide in foods and sulfur dioxide in Chinese medicinal materials under the Chinese Pharmacopoeia have become largely consistent. Based on the new national standard and Pharmacopoeia methods, Jinan Shengtai Technology has jointly developed four specialized testing instruments: ST109A, ST109B1, ST109C, and ST109D.

Product Features:

      * Heating method: Automatic far-infrared ceramic heating management system with automatic dry-burn protection technology;

      * Cooling method: Integrated design with a built-in compressor in the main unit, automatically completing internal cooling-water circulation without the need for an external chiller;

      * Condenser design: Reflux condenser specifically designed for national standards;

      * Control system: Automatic temperature-rise technology, with selectable gentle-boiling and full-boiling heating modes; automatic timer: 0-999 min;

      * Reagent addition: Reagents can be added automatically via a high-precision reagent dispensing pump, eliminating manual operation;

      * Nitrogen control: Controlled by a rotameter; range: 100-2000ml/min;

Technical Parameters:

1. Built-in cooling-water circulation unit: The integrated cooling-water circulation system of the main unit shall include a built-in compressor, built-in cooling-water tank, automatic water pump, radiator, fan, and other components. A built-in compressor refrigeration circulation system shall be installed inside the main unit. During operation, the compressor system automatically starts and stops according to the cooling-water temperature, without manual switching. The built-in compressor shall be integrated with the main unit.

2. Short-circuit protection and automatic drying function: Under high-temperature and humid operating conditions, the heating area is highly susceptible to moisture, which may cause circuit short circuits. The main unit shall be designed with leakage protection and an automatic drying function for the heating area. The drying time can be set from 0-999 seconds. When a single heating area is damp and short-circuited, the drying function can be activated to restore the moisture-affected circuit, allowing the equipment to return to normal operating condition.

3. The main unit shall be designed with automatic distillation and automatic stop systems. An over-distillation protection device shall be designed at each distillate outlet. After distillation is completed, the system can automatically lock the distillate outlet, ensuring that the distillation operation is completed automatically and quantitatively.

4. Equipped with multi-level administrator permission settings, enabling storage management and export of experimental data. According to user requirements, it can interface with the lims system to upload experimental operation data.