YB/T 5217-2005 Fluorspar

YB/T 5217-2019 Fluorite

GB/T 2007.7-1987 General rules for the sampling and sample preparation of minerals in bulk—The method for determination of size by manual sieving GB/T 2008-1987 Method of sampling and sample preparation of fluorspar in bulk GB/T 5195.1-2006 Fluorspar—Determination of calcium fluoride content GB/T 5195.1-2017 Fluorspar—Determination of calcium fluoride content—EDTA titration method and distillation-potentiometric titration method GB/T 5195.10-2006 Fluorspar—Determination of iron content—1,10-phenanthroline spectrophotometric method GB/T 5195.2-2006 Fluorspar—Determination of carbonate content GB/T 5195.3-2006 Fluorspar—Determination of loss in mass at 105℃—Gravimetric method GB/T 5195.3-2017 Fluorspar—Determination of loss in mass at 105 ℃—Gravimetric method GB/T 5195.5-2006 Fluorspar—Determination of total sulfur content—The iodometric method after combustion GB/T 5195.5-2017 Fluorspar—Determination of total sulfur content—Pipe furnace combustion iodic acid potassium titration method GB/T 5195.6-2006 Fluorspar—Determination of phosphorus content GB/T 5195.6-2017 Fluorspar—Determination of phosphorus content—Photometric method GB/T 5195.8-2006 Fluorspar—Determination of silicon dioxide content GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values YB/T 5142