Alumina's International Standards and National Standards

The national standards generally adopt traditional chemical analysis methods to analyze the composition grade of alumina, and the method is cumbersome. According to the analysis cycle, it strictly follows the requirements of GB/T 15000.1-15000.5-1994 and YS/T409-1998 standards, after sample preparation, Mixed process, constant value, homogeneity experiment, normal distribution test, stability verification, production analysis and appraisal, and other complex processes, and then through appraisal committee consistent evaluation, sample composition design is reasonable, in line with YZ/T272-1998 "alumina" products Standard chemical composition requirements can be considered as national qualified products.

X-ray fluorescence spectrometry is widely used in international standards. The standard sample used must be formulated with high-purity oxide. The preparation procedure is complicated. For the alumina samples with more analysis components, they are strictly in accordance with the International Organization for Standardization (ISO), JB/T4281-1999. Standards and ISO5182-1999(E) International Standards Compliance with X-ray fluorescence spectroscopy through complex processes such as sample preparation, mixing, set-value, homogeneity testing, normal distribution testing, stability verification, and production analysis use assessment The standard; Uniformity and stability, accurate and reliable set value results. Especially in the process of sample synthesis, according to the large specific surface area of ​​alumina, the alumina adsorption test adopted for the actual adsorption performance can meet international standards.

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