GB/T 12690.12-2003
AbolishedChemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of thorium content--Arsenazo III spectrophotometric method and inductively coupled plasma mass spectrum method
稀土金属及其氧化物中非稀土杂质化学分析方法 钍量的测定 偶氮胂III分光光度法和电感耦合等离子体质谱法
Application Summary AI generated
This standard specifies two methods—Arsenazo III spectrophotometry and inductively coupled plasma mass spectrometry (ICP-MS)—for determining thorium content in rare earth metals and their oxides. It is applied in the metallurgical industry for quality control and purity analysis of rare earth materials, particularly to monitor trace thorium impurities that affect material properties or regulatory compliance. The standard is used in production, inspection, and research settings for rare earth products such as oxides, metals, and alloys.
Related Standards
GB/T 5153-2003
Designation and composition of wrought magnesium and magnesium alloys
GB/T 12690.13-2003
Chemical analysis methods for non-rareearth impurities of rare earth metals and their oxides--Determination of molybdenum and tungsten content--Induct-ively coupled plasma atomic emission spectrographic method and inductively coupled plasma mass spectrum
GB/T 12690.4-2003
Chemical analysis methods for non-rare earth impurities ofrare earth metals and their oxides--Determination of oxygen and nitrogen content--Impulse-infrared and impulse-thermal conductance absorption 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 12690.11-2003
Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of magnesium content--Flame atomic absorptionspectrometric method
GB/T 12690.6-2003
Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of iron content--Kalium thiocyanate，1，10-phenanthroline spectrophotometric method
GB/T 12690.5-2003
Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of Al、Cr、Mn、Fe、Co、Ni、Cu、Zn、Pb content by inductively coupled plasma atomic emission spectrographic method--Determination of Co、Mn、Pb、N
GB/T 12690.7-2003
Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides--Determination of silicon content--Molybdenum blue spectrophotometric method
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