AOAC Official Method 940.20 Sulfurous Acid in Wines
First Action 1940
Final Action
Proceed as in 962.16C (see 47.3.39), using 100–300mLwine. Report results as mg SO2/L. (As SO2 in wine is unstable, give test portion no preparatory degassing treatment and expose to air for minimum time prior to determination.)
References: JAOAC 23, 189(1940); 25, 70, 82, 296(1942); 27, 85(1944).
CAS-7446-09-5 (sulfur dioxide)
CAS-7782-99-2 (sulfurous acid)
