摘要
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。
Dip tannic acid in rubber acorn out and precipitate with cuprammonia, then oxidizewith dichromate potassium, take a measure of return titration of over-dichromate potassiumwith standard ammonium ferrous sulphate. Caculate the content of tannic acid.
出处
《哈尔滨商业大学学报(自然科学版)》
CAS
1999年第3期60-63,63-64,共6页
Journal of Harbin University of Commerce:Natural Sciences Edition
关键词
单宁测定
重铬酸钾法
caculation of tannic acid
over-dichromate potassium