Study on Grading of Gypsum Pieces / 中国药师

ABSTRACT

Objective:To comprehensively evaluate the intrinsic and external quality, and explore the grading of gypsum pieces. Methods:The characteristics, contents of main components and trace elements and X-diffraction exclusive characteristic peaks of gyp-sum pieces from different origins were detected. Combined with the market grading, the grading standard for gypsum pieces was further improved. Results:According to the tested indices, gypsum pieces were graded into two classesexcellent pieces and common decoc-tion pieces. Conclusion:The study shows reference value for guiding the market grading of gypsum pieces.