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》 Related products

This standard specifies a method for the determination of mg content in rare earth metals and their oxides by flame atomic absorption spectroscopy (AAS), applicable to the determination of mg content in the range of 0.0005% to 0.300%. Absorbance of mg is determined at 285.2 nm after the sample is dissolved in a dilute acid medium, and the mg content is calculated using the Standard addition method. The standard details the required reagents, instrument requirements and operation procedures to ensure the accuracy and reliability of the determination results. This standard provides standardized technical guidance for related analysis.