GB/T 15057.5-1994 Limestone for chemical industry—Determination of silicon dioxide content—Molybdenum blue spectrophotometric method

GB/T 15057.1-1994 Limestone for chemical industry—Methods of sampling and preparing GB/T 15057.2-1994 Limestone for chemical industry—Determination of calcium and magnesium oxides content GB/T 15057.3-1994 Limestone for chemical industry—Determination of insoluble matter content of hydrochloric acid—Gravimetric method GB/T 15057.4-1994 Limestone for chemical industry—Determination of iron and aluminium oxides content—Gravimetric method GB/T 15057.6-1994 Limestone for chemical industry—Determination of iron content—Phenanthroline spectrophotometric method GB/T 15057.7-1994 Limestone for chemical industry—Determination of aluminium oxide content—Chromazurol S spectrophotometric method GB/T 15057.8-1994 Limestone for chemical industry—Determination of sulfur content—The barium sulfate gravimetric and combustion-iodate titrimetric methods GB/T 15057.9-1994 Limestone for chemical industry—Determination of phosphorus content—Molybdenum blue spectrophotometric method GB/T 15057.10-1994 Limestone for chemical industry—Determination of content of loss on ignition—Gravimetric method GB/T 15057.11-1994 Limestone for chemical industry—Determination of size

GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 9721-1988 Chemical reagent General rules for the molecular absorption spectrophotometry(ultraviolet and visible) GB/T 9721-2006 Chemical reagent—General rules for the molecular absorption spectrophotometry (ultraviolet and visible)

DIN 52240-3-1985