GOST 21119.12-1992 General methods of test for pigments and extenders. Determination of acidity or alkalinity of the aqueous extract*, 1992-04-18 Update
GOST 24104-1988 General purpose laboratory balances and comparison balances. Performance. Specifications*, 1988-04-18 Update
GOST 25336-1982 Laboratory glassware and equipment. Basic parameters and dimensions*, 1982-04-18 Update