Sulfur dioxide and sulfites, are widely used as preservatives and antioxidants in foods and beverages. If the amount of sulfur dioxide substances used in food processing is not well controlled, or some companies use excessive sulfur dioxide additives in order to pursue good appearance and color of their products, extend the shelf life of food, or cover up inferior food, regardless of standard restrictions, It is possible to cause the residual amount of sulfur dioxide in food to exceed the national standard, thereby causing certain adverse effects on human health. 

In China the maximum levels set for sulfur dioxide, Potassium metabisulfite, sodium metabisulfite, sodium sulfite, sodium hydrogen sulfite, and sodium hyposulfite depend on the category of food. The levels range from 50 to 400 mg/kg.

AUWII DSD 1000 series Sulfur Dioxide(SO2) Distiller can quick and easy distillation & determination of total SO2 in foods, adopting a highly integrated design, with width of 625px ,it can be used independently as well as multiple sets in parallel.