The sulfur dioxide standard of substitute tea refers to the limit standard of sulfur dioxide concentration added in tea, which is usually used to monitor whether the sulfur dioxide content in tea is within a safe range. The following are some examples of sulfur dioxide standards for tea substitutes:

—— China's national standard GB2762-20 17 Maximum Residue Limits of Pesticides in Food.

-Tea (dry weight): ≤ 200mg/kg

-Maximum dosage of additives specified in Council of Europe.

-Tea and tea extract: ≤ 1000mg/kg.

-Food additive safety standards stipulated by the US Food and Drug Administration (FDA)

-Sulfur dioxide is only allowed to be used in certain foods, such as wine, beer and raisins, raisin berries and oxidized apple slices, and the sulfur dioxide in tea should not exceed the legal ingredient limit.

In short, different countries and regions may have slightly different sulfur dioxide standards for substitute tea, but the sulfur dioxide content in tea is usually limited to a certain value to ensure the safety and health of tea.