This part specifies the method for the determination of calcium oxidation and oxidation mg content by flame atomic absorption spectroscopy (AAS). It is suitable for the determination of calcium oxidation and oxidation mg content in titanium concentrates (rocks and minerals), and the determination range is 0.050% to 2.00% and 0.050% to 1.00%, respectively. By citing documents such as GB/T 6682 and GB/T 7728, the specifications and test methods for laboratory water are determined, as well as the general rules of flame atomic absorption spectroscopy (AAS) method. Absorbance is determined in AtomicAbsorption Spectroscopy after the sample is analyzed and Releasing agent is applied. Reagents and materials use high-grade pure reagents and distillation water, and purify strontium chloride solution according to regulations.