GOST 21138.4-1985
Chalk. Method for determination of copper content

Standard No.

GOST 21138.4-1985

Release Date

1985

Published By

RU-GOST R

Latest

GOST 21138.4-1985

Replace

GOST 21138.4-1975

Scope

This standard applies to natural chalk and establishes an extraction-photocolorimetric method for determining mass d

GOST 21138.4-1985 Referenced Document

• GOST 10652-1973 Reagents. Dihydrate ethylenediaminetetraacetic acid disodium salt. Specifications
• GOST 1770-1974 Laboratory volumetric glassware. Cylinders, beakers, measuring flasks, test tubes. General specifications
• GOST 18300-1972 Rectified technical ethyl alcohol. Specifications
• GOST 20288-1974 Reagents. Carbon tetrachloride. Specifications
• GOST 20292-1974 Laboratory volumetric glassware. Burettes, pipettes
• GOST 21138.0-1985 Chalk. General requirements for methods of analysis
• GOST 3118-1977 Reagents. Hydrochloric acid. Specifications
• GOST 3760-1979 Reagents. Ammonia water. Specifications
• GOST 4165-1978 Reageuts. Copper II sulphate pentahydrate. Specifications
• GOST 4204-1977 Reagents. Sulphuric acid. Specifications
• GOST 4212-1976 Reagents. Methods for preparation of solutions for colorimetric and nephelometric analysis
• GOST 4919.1-1977 Reagents and matters of special purity. Methods for preparation of indicators solutions
• GOST 8864-1971 Reagents. N,N-sodium diethyldithiocarbamate 3-aqueous. Specifications*， 2024-04-19 Update

GOST 21138.4-1985 history

• 1985 GOST 21138.4-1985 Chalk. Method for determination of copper content
• 0000 GOST 21138.4-1975