GOST 31957-2012 PDF

GOST 31957-2012 Referenced Document

GOST 14919-1983 Household electric cooking ranges, cooking plates and cooking ovens. General specifications
GOST 17.1.5.05-1985 Nature protection. Hydrosphere. General requirements for surface and sea waters, ice and atmospheric precipitation sampling
GOST 1770-1974 Laboratory volumetric glassware. Cylinders, beakers, measuring flasks, test tubes. General specifications
GOST 3118-1977 Reagents. Hydrochloric acid. Specifications
GOST 4199-1976 Reagents. 10-aqueous sodium tetraborate. Specifications
GOST 4328-1977 Reagents. Sodium hydroxide. Specifications
GOST 4919.2-1977 Reagents and matters of special purity. Methods for preparation of buffer solutions
GOST 6709-1972 Distilled water. Specifications
GOST 6755-1988 Chemical lime absorbent ХП-И. Specifications*， 2023-12-21 Update
GOST 8.135-2004 State system for ensuring the uniformity of measurements. Weight amouhts of the standard materials for preparation of the buffer solutions - operational pH standards of 2-nd and 3-rd classes. The technical and the metrological characteristics. Methods of
GOST 83-1979 Reagents. Sodium carbonate. Specifications
GOST R 53228-2008 Non-automatic weighing instruments. Part 1. Metrological and technical requirements. Tests

2012 GOST 31957-2012 Water. Methods for determination of alkalinity and mass concentration of carbonates and hydrocarbonates