WARNING: Personnel using this standard should have practical experience in formal laboratory work. This standard does not address all possible safety issues. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations. This standard specifies the principle, reagents, instruments, samples, analysis steps, calculation of analysis results and tolerances for the determination of phosphorus content in fluorite. This standard includes two methods: molybdenum blue spectrophotometry, measuring range (mass fraction expressed in P): 0.002% to 0.50%; ammonium phosphomolybdate reduction spectrophotometry, measuring range (mass fraction expressed in P): 0.0010% to 0.30%. This standard applies to the determination of phosphorus content in fluorite.
GB/T 5195.6-2006 Referenced Document
GB/T 2008 Method of sampling and sample preparation of fluor-spar in bulk
GB/T 5195.6-2006 history
2017GB/T 5195.6-2017 Fluorspar—Determination of phosphorus content—Photometric method
2006GB/T 5195.6-2006 Fluorspar. Determination of phosphorus content
1985GB/T 5195.6-1985 Methods for chemical analysis of fluor-spar--The molybdenum blue photometric method for the determination of phosphorus content
GB/T 5195.6-2006 Fluorspar. Determination of phosphorus content has been changed from GB/T 5195.7-1985 Methods for chemical analysis of fluor-spar--The molybdenum blue-rhodamine B photometric method for the determination of phosphorus content.