Food sulfur dioxide distillerIt is a core pre-treatment equipment used for detecting residual sulfur dioxide (and sulfite) in samples such as food and traditional Chinese medicine. It integrates heating, distillation, condensation, nitrogen blowing and other functions, and can convert sulfur-containing compounds in the sample intoSO₂And separate and enrich for subsequent titration or spectrophotometric determination.

Food sulfur dioxide distillerOperation process:

Preparation stage:

Install instruments, connect distillation bottles, condenser tubes, receiving bottles and other components to ensure sealing and no leakage.

Prepare the reagents, weigh the sample and place it in a distillation flask, then add water to dissolve it.

Distillation stage:

Insert the lead acetate absorbent into the receiving bottle at the lower end of the condenser tube.

Add hydrochloric acid to the distillation flask and immediately cap it.

Start the instrument, set the heating temperature and distillation time, and begin distillation.

Titration stage:

After distillation, add concentrated hydrochloric acid and starch indicator solution to the receiving bottle.

Titrate with iodine standard solution until the solution turns blue and30Do not fade within seconds, record the volume of iodine solution consumed.

Result calculation:

Calculate the sulfur dioxide content based on titration data and sample quality, and compare it with the standard limit to determine if it exceeds the standard.

Features:

Strong compliance: Complies with relevant testing procedures and is a commonly used instrument for food processing enterprises, quality inspection agencies, and research institutes.

Efficient and stable: Multi station parallel processing, precise temperature control, good experimental repeatability, effectively reducing human error.