XB/T 405-2016 Cerium-ferro alloy

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 12690.1-2002 Chemical analysis methods for non-RE impurity of rare earth metals and their oxides—Determination of carbon and sulfur contents—High frequency-infrared absorption method GB/T 12690.1-2015 Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides—Part 1:Determination of carbon and sulfur contents—High frequency-infrared absorption method GB/T 12690.1-2022 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 1:Determination of carbon and sulfur contents—High frequency-infrared absorption method GB/T 12690.4-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of oxygen and nitrogen content—Impulse-infrared and impulse-thermal conductance absorption method GB/T 12690.4-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 4:Determination of oxygen and nitrogen contents—Impulse-infrared absorption and impulse-thermal conductivity method GB/T 12690.10-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides Determination of phosphorus content by molybdenum blue spectrophotometric method GB/T 17803-1999 Designation system for rare earth products GB/T 17803-2015 Designation system for rare earth products