Standards GB - Chinese national standards - Page 471

Limestone for chemical industry--Determination of iron and aluminium oxides content--Gravimetric method

Standard published on 5.5.1994

Limestone for chemical industry--Determination of silicon dioxide content--Molybdenum blue spectrophotometric method

Standard published on 5.5.1994

Limestone for chemical industry--Determination of iron content--Phenanthroline spectrophotometric method

Standard published on 5.5.1994

Limestone for chemical industry--Determination of aluminium oxide content--Chromazurol S spectrophotometric method

Standard published on 5.5.1994

Limestonefor chemical industry--Determination of sulfur content--Gravimetric and combustion-iodate titrimetric methods

Standard published on 5.5.1994

Limestone for chemical industry--Determination of phosphorus content--Molybdenum blue spectrophotometric method

Standard published on 5.5.1994

Method for determining the water expansion and shrinkage of photographic film base

Standard published on 5.5.1994

Manganese ores—Determination of manganese content—Potentiometric method and ammonium iron() sulphate titrimetric method

Standard published on 29.8.2016

General specifications for sensitometry of silver halide photographic materials--Part 1:Sensitometric exposure conditions of films to be exposured for incandescent tungsten and daylight

Standard published on 5.5.1994

Wrought superalloy—Seamless tube

Standard published on 29.8.2025