Completely faithful to the statutory testing methods of the 2015 and 2020 editions of the Chinese Pharmacopoeia
Traditional Chinese medicine sulfur dioxide analyzer with automatic acid addition, automatic titration and automatic data calculation
 
Usage
It can be used for the pre-treatment of sulfur dioxide residues in Chinese medicinal materials and decoction pieces in the methods specified in the Chinese Pharmacopoeia.
The 2015 edition of the Chinese Pharmacopoeia stipulates three methods for detecting sulfur dioxide: acid-base titration, gas chromatography, and ion chromatography. Gas chromatography and ion chromatography have the advantages of high sensitivity and strong specificity, but the instruments and equipment are expensive, which is not conducive to the promotion and use of grassroots drug testing systems; acid-base titration has the advantages of simple equipment and low cost, and is a statutory detection method stipulated in the Pharmacopoeia. However, since the Pharmacopoeia only describes the glass instrument device of this method, the purchase, assembly and implementation of the entire set of equipment still need to be continuously improved. For example: (1) In addition to the glass instrument device, it is also necessary to equip it with a magnetic stirrer, an electric heating jacket, a titration platform, a nitrogen device with a flow meter, etc., and assemble them. Many units feel that it is cumbersome to purchase too many equipments and difficult to assemble and implement, so they are unable to carry out this test method; (2) The assembled devices are varied and there are problems such as unstable nitrogen flow rate, uneven heating, easy leakage, easy boiling, and easy to be affected by cooling water source during use, which directly affect the test results, such as poor parallelism and low recovery rate; (3) The work efficiency is low. The current equipment uses a single-unit device, which is difficult to process multiple samples at the same time. It is time-consuming and laborious to test multiple batches of medicinal materials at the same time.

Instrument innovation:

Multifunctional integrated design including automatic acid addition, far-infrared ceramic heating, automatic timed distillation, built-in compressor cooling, nitrogen blowing control, magnetic stirring, automatic titration, automatic result calculation, etc.
Cooling method: The main unit has a built-in compressor cooling circulation system, a perfect integrated design, and no external chiller or tap water cooling;

Heating method: The main unit adopts far-infrared ceramic heating device instead of ordinary electric heating furnace or electric heating sleeve, which is more energy-saving, has good waterproof effect and is resistant to acid and alkali corrosion;

Sample quantity: 1-4. Heating power can be single hole monotonic;

Acid adding method: closed automatic acid adding, through the LCD touch screen, just tap the screen to automatically complete the acid adding;

Nitrogen control: The main engine has a built-in four-way rotor flowmeter, and the flow control range is 60-600ml/min;

Automatic titration: The main unit has a built-in titration unit, which can automatically titrate after the distillation is completed.

Applicable units and test items:
TCM inspection and testing units at all levels, TCM R&D and production enterprises, and TCM pharmacies, etc., which need to test the sulfur dioxide residue in TCM, medicinal materials, and decoction pieces.