Materials with the same chemical formula but different crystal structures are called crystal polymorphs. Since an X-ray diffraction profile depends on the crystal structure of the measured material, X-ray diffraction measurement is used to evaluate crystal polymorphs. Here we show an example in which a trace component of anatase (TiO₂) contained in titanium oxide with a rutile (TiO₂) structure, sold commercially as a reagent, was evaluated with the standard addition method by using a high-speed 1-dimensional detector.
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