GB/T 3286.2-2012
Methods for chemical analysis of limestone and dolomite.Part 2:The determination of silicon dioxide content.The silicomolybdic blue spectrophotometric method and the perchloric acid dehydration gravimetric method (English Version)

Standard No.: GB/T 3286.2-2012
Language: Chinese, Available in English version
Release Date: 2012
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 3286.2-2012
Replace: GB/T 3286.2-1998

Scope: Personnel using this section should have formal laboratory work experience. This section does not point out all possible safety issues, the user is responsible for taking appropriate safety and health measures, and ensuring compliance with the conditions stipulated in the relevant national laws and regulations. This part of GB/T 3286 specifies the determination of silicon dioxide content by silicon molybdenum blue spectrophotometry and perchloric acid dehydration gravimetric method. This section applies to the determination of silica content in limestone and dolomite, and also applies to the determination of silica content in metallurgical lime. Molybdenum blue spectrophotometry, measuring range (mass fraction): silica content 0.05% to 4.0%; perchloric acid dehydration gravimetric method, measuring range (mass fraction): silica content greater than 2.0%.

GB/T 3286.2-2012 Referenced Document

GB/T 2007.2 General rules for the sampling and sample preparation of minerals in bulk--Manual method of sample preparation
GB/T 3286.1 Methods for chemical analysis of limestone and dolomite.Part 1:The determination of calcium oxide and magnesium oxide content.The complexometric titration method and the flame atomic absorption spectrometric method
GB/T 3286.3 Methods for chemical analysis of limestone and dolomite.Part 3:The determination of aluminium oxide content.The chrome azurol S spectrophotometric method and the complexometric titration method
GB/T 3286.4 Methods for chemical analysis of limestone and dolomite.Part 4:The determination of iron oxide content.The o-phenanthroline spectrophotometric method and the flame atomic absorption spectrometric method
GB/T 6379.2 Accuracy(trueness and precision)of measurement methods and results-Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

2012 GB/T 3286.2-2012 Methods for chemical analysis of limestone and dolomite.Part 2:The determination of silicon dioxide content.The silicomolybdic blue spectrophotometric method and the perchloric acid dehydration gravimetric method
1998 GB/T 3286.2-1998 Methods for chemical analysis of limestone and dolomite--The determination of silicon dioxide content