GB/T 11198.12-1989
Sulphuric acid for industrial use--Determination of sulphur dioxide content--Iodometric method
\u0413\u041e\u0421\u0422 34201-2017
Sugar. Determination of sulphur dioxide content by iodometric method
KS M ISO 3423-2015(2020)
Sulphuric acid and oleums for industrial use-Determination of sulphur dioxide content-Iodometric method
DB22/T 322-2002
ISO 3423:1975
Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method
UNE 55590:1981
SURFACE ACTIVE AGENTS. SULPHURIC ACID AND OLEUMS FOR USE AS RAW-MATERIALS IN DETERGENT FORMULATIONS. DETERMINATION OF SULPHUR DIOXIDE CONTENT. IODOMETRIC METHOD
ISO 3702:1976
Anhydrous hydrogen fluoride for industrial use — Determination of sulphur dioxide content — Iodometric method