橡子中单宁含量的快速测定

FAST DETERMINATION OF CONTENTS OF TANNIN IN ACORN

将橡子中单宁浸出，用铜氨溶液沉淀，再用重铬酸钾氧化，过量的重铬酸钾用标准硫酸亚铁铵返滴定。计算单宁含量．

This paper discribed the method that the tannin in acom is take out in solution, the tannin is sank into by cuproammmonium solution, and then Oxidized with bichrome, over-amounted bichrome is revert -driped with standard ammonium ferrous sulfat. The contents of tannin were calclated.