The standard method of determining tannin was used to analyze intensive sulfitation tannin extract and the results showed there was only 3.

 
  • 应用鞣质测定的标准方法对重度亚硫酸化改性栲胶进行分析;其鞣质含量仅为3.;2%25;而鞣质的定性试验却表明滤液中仍存在大量的鞣质。
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