GB/T 14505-1993 Method for chemical analysis of rocks and ores—General rules and regulations

GB/T 14505-2010 Method for chemical analysis of rocks and ores—General rules and regulations

GB/T 6379-1986 Precision of test methods Determination of repeatability and reproducibility for a standard test method by interlaboratory tests GB/T 6379.1-2004 Accuracy(trueness and precision)of measurement methods and results—Part 1:General principles and definitions GB/T 6379.2-2004 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 6379.3-2012 Accuracy(trueness and precision)of measurement methods and results—Part 3:Intermediate measures of the precision of a standard measurement method GB/T 6379.4-2006 Accuracy (trueness and precision) of measurement methods and results—Part 4:Basic methods for the determination of the trueness of a standard measurement method GB/T 6379.5-2006 Accuracy (trueness and precision) of measurement methods and results—Part 5:alternative methods for the determination of the precision of a standard measurement method GB/T 6379.6-2009 Accuracy(trueness and precision)of measurement methods and results—Part 6:Use in practice of accuracy values 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 GB 3100-1993 SI units and recommendations for the use of their multiples and of certain other units GB/T 3102.8-1993 Quantities and units—Physical chemistry and molecular physics GB/T 6379.4-2025 Accuracy(trueness and precision)of measurement methods and results—Part 4:Basic methods for the determination of the trueness of a standard measurement method