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 (English Version)
This document describes methods for the determination of carbon and sulfur content in rare earth metals and their oxides. This document is applicable to the determination of carbon and sulfur content in rare earth metals and their oxides. Measuring range (mass fraction): Carbon 0.0020%~1.00%; Sulfur 0.0020%~0.20%.
GB/T 12690.1-2022 Referenced Document
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 12690.1-2022 history
2022GB/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
2015GB/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
2002GB/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