Abstract
In order to indentify calcium quickly and accurately in solid matter, a variety of identification methods were compared and etching flame reaction method was proposed in this study. In this study, ordinary flame reaction method, indicator method, precipitation method, etching flame reaction method and X-ray diffraction were used to identify the calcium. The results of identification showed that ordinary flame reaction method and indicator method easily suffered from the surrounding, and that X-ray diffraction required the expensive and large-scale instrument; however, etching flame reaction method was quick, accurate, and low-cost. It is concluded that etching flame reaction method is a very suitable method for the identification of the calcium in solid matter.
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