GB/T 20973-2007

GB/T 5463.2-1985 Technical terms of non-metallic mineral products--Talc GB/T 5463.1-1985 Non-metallic mineral products--Commonly usedterms GB/T 5463.3-1986 Technical terms of non-metallic mineral products--Gypsum and anhydrite GB/T 15057.9-1994 Limestone for chemical industry--Determination of phosphorus content--Molybdenum blue spectrophotometric method GB/T 15057.8-1994 Limestonefor chemical industry--Determination of sulfur content--Gravimetric and combustion-iodate titrimetric methods GB/T 15057.7-1994 Limestone for chemical industry--Determination of aluminium oxide content--Chromazurol S spectrophotometric method GB/T 15057.6-1994 Limestone for chemical industry--Determination of iron content--Phenanthroline spectrophotometric method GB/T 15057.5-1994 Limestone for chemical industry--Determination of silicon dioxide content--Molybdenum blue spectrophotometric method