GB/T 6730.89-2024 Iron ores—Determination of thorium content—Arsenazo Ⅲ spectrophotometric method

GB/T 6730.63-2024 Iron ores—Determination of aluminum,calcium,magnesium,manganese,phosphorus,silicon and titanium content—Inductively coupled plasma atomic emission spectrometric method GB/T 6730.73-2024 Iron ores—Determination of total iron content—EDTA photometric titration method GB/T 6730.88-2024 Iron ores—Determination of chlorine content—X-ray fluorescence spectrometric method

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 6730.1-1986 Methods for chemical analysis of iron ores—Preparation of predried test samples for chemical analysis GB/T 6730.1-2016 Iron ores—Preparation of predried test samples for chemical analysis GB/T 6730.3-1986 Methods for chemical analysis of iron ores The gravimetric method for the determination of hygroscopic moisture content in analytical samples GB/T 6730.3-2017 Iron ores—Determination of hygroscopic moisture in analytical samples—Gravimetric,Karl Fischer and mass-loss 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 10322.1-2000 Iron ores—Sampling and sample preparation procedures GB/T 10322.1-2014 Iron ores—Sampling and sample preparation procedures GB/T 10322.1-2023 Iron ores—Sampling and sample preparation procedures 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