Methods Eight decoctions with gypsum were prepared and analysed by L8 ( 27) orthogonal design and the contents of calcium sulphate were determined by EDTA titration.

  • 方法采用L(827)正交设计,用EDTA络合测定法测定硫酸钙的含量。

  • 互联网摘选 2025-01-20 13:14:38

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