GB/T 3653.4-2025 Ferroboron—Determination of aluminum content—EDTA titrimetric method,chrome azurol S spectrophotometric method and inductively coupled plasma atomic emission spectrometric method

GB/T 3653.4-2008 Ferroboron—Determination of aluminium content—EDTA titrimetric method

GB/T 4010-1994 Ferroalloys—Sampling and preparation of samples for chemical analysis GB/T 4010-2015 Ferroallys sampling and preparation of samples for chemical analysis 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 7729-2021 Chemical analysis of metallurgical products—General rule for spectrophotometric 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 JJG 768-2005 Emission Spectrometer