T/SDAS 220-2021
T/PZSGXH 003-2024
T/CPCIF 0248-2023
GB/T 3514-1992
Rubber, vulcanized—Determination of free sulphur content—Sodium sulphite method
TAPPI TIP0607-18
Density of Aqueous Sodium Sulfite Solution
GB/T 14454.13-1993
Aromatics—Determination of carbonyl compounds content—Neutral sodium sulfite method
T/CIEP 0017-2024
UNE 55512-4:1982
SURFACE ACTIVE AGENTS. TECHNICAL SODIUM ALKYLARYL-SULPHONATES (EXCLUDING BENZENE DERIVATIVES). DETERMINATION OF THE CONTENT OF THE SODIUM SULPHITE
KS M ISO 9020-2002
Binders for paints and varnishes-Determination of free-formaldehydecontent of amino resins-Sodium sulfite titrimetric method
BS EN ISO 9020:1998
Binders for paints and varnishes. Determination of free-formaldehyde content of amino resins. Sodium sulfite titrimetric method
ISO 9020:1994
Binders for paints and varnishes — Determination of free-formaldehyde content of amino resins — Sodium sulfite titrimetric method