The NAI-ZLY-1S series of traditional Chinese medicine sulfur dioxide residue detectors is used to determine the residual amount of sulfur dioxide in medicinal materials or decoction pieces that have been treated with sulfur fumigation, in accordance with the provisions of General Rule 2331, Method 1 of the Pharmacopoeia of the People's Republic of China. The main principle of the detection method provided in the pharmacopoeia is to process Chinese medicinal materials by distillation. After acid treatment, the sulfite series substances in the sample are converted into sulfur dioxide, which is then carried into an absorption bottle containing hydrogen peroxide with nitrogen gas flow. The hydrogen peroxide oxidizes it into sulfate ions, which are determined by acid-base titration to calculate the residual amount of sulfur dioxide in the medicinal materials and decoction pieces. On the basis of strictly following the requirements of the pharmacopoeia, the functions of heating, distillation, nitrogen blowing, timing, and titration are integrated into one, and multiple instruments can be used in series to maximize the accuracy and efficiency of detection data.

Application Range

This instrument is mainly suitable for various traditional Chinese medicine production enterprises, traditional Chinese medicine research institutes, and food production enterprises related to sulfur fumigation, for routine determination of sulfur dioxide residue.

Main characteristics: Principal character

1. The latest sealed infrared ceramic heating technology is selected, which has the advantages of good heat collection, high heating efficiency, long service life, acid and alkali corrosion resistance, and leakage prevention.
2. The heating countdown function can adjust the heating time as needed and automatically stop heating at the end of the experiment.
3. The heating device has independent temperature control and adjustable heating power.
4. The mixing device has independent temperature control and adjustable mixing rate.
5. Reserved water and nitrogen circulation expansion interfaces can be used in series with multiple instruments.
6. Configure an independent precision nitrogen flow control system and reserve gas path expansion interfaces to enable multiple instruments to be used in series. It can also be equipped with a nitrogen generator for use.

Technical parameters