GB 5009.34-2022 is applicable to the determination method of Sulfur Dioxide in food. Compared with GB 5009.34-2016, it revised the original titration method to acid-base titration method，and added spectrophotometry and Ion chromatography.

Contents

1. Scope

2. Principle

3. Reagents and materials

4. Equipments and instruments

5. Analysis steps

6. Descriptions

7. Precision

Appendix A schematic diagram of distillation apparatus for acid-base titration

Appendix B schematic diagram of steam distillation device

Appendix C typical spectrum of Sulfur Dioxide standard working solution