GB/T 44031-2024 Manganese ores—Methods of chemical analysis—General instructions

GB/T 1.1-2000 Directives for standardization—Part 1:Rules for the structure and drafting of standards (ISO/IEC Directives, Part 3,1997,Rules for the structure and drafting of international standards, NEQ) GB/T 1.1-2009 Directives for standardization—Part 1:Structure and drafting of standards GB/T 1.1-2020 Directives for standardization—Part 1:Rules for the structure and drafting of standardizing documents GB/T 601-2002 Chemical reagent Preparations of standard volumetric solutions GB/T 601-2016 Chemical reagent—Preparations of reference titration solutions GB 3100-1993 SI units and recommendations for the use of their multiples and of certain other units GB/T 3101-1993 Quantities and units—General principles 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 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 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/T 12805-1991 Laboratory glassware—Burettes GB/T 12805-2011 Laboratory glassware—Burettes GB/T 12806-1991 Laboratory glassware—One-mark volumetric flasks GB/T 12806-2011 Laboratory glassware—One-mark volumetric flasks GB/T 12807-1991 Laboratory glassware—Graduated pipettes GB/T 12807-2021 Laboratory glassware—Graduated pipettes GB/T 12808-1991 Laboratory glassware—One-mark pipettes GB/T 12808-2015 Laboratory glassware—One mark pipettes GB/T 14949.8-1994 Manganese ores—Determination of hygroscopic moisture content in analytical samples GB/T 14949.8-2018 Manganese ores—Determination of hygroscopic moisture content—Gravimetric method

ISO 4297:1978