GB/T 47403-2026 Ferroniobium—Determination of niobium,tantalum,silicon,phosphorus,aluminium contents—Wavelength dispersive X-ray fluorescence spectrometric(fused cast bead 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 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 16597-1996 Analytical methods of metallurgical products General rule for X-ray fluorescence spectrometric methods GB/T 16597-2019 Analytical methods of metallurgical products—General rule for X-ray fluorescence spectrometric methods JJG 810-1993 Wavelength Dispersive X-Ray Fluorescence Spectrometers