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The Determination of the Titre of Ascorbic Acid Standard Solutions

 

作者: J. Barek,   A. Berka,  

 

期刊: Analytical Letters  （Taylor Available online 1975）
卷期: Volume 8, issue 1  

页码: 57-61

 

ISSN:0003-2719

 

年代: 1975

 

DOI:10.1080/00032717508060361

 

出版商: Taylor & Francis Group

 

关键词: ascorbic acid;titre;dichromate;o-tolidine;pyrophosphate complex of tervalent manganese

 

数据来源: Taylor

 

摘要:

A new method for the determination of the titre of ascorbic acid standard solutions employing potassium dichromate as a primary standard has been developed. In a pyrophosphate medium, the pyrophosphate complex of divalent manganese is oxidized by dichromate to the pyrophosphate complex of tervalent manganese; the latter oxidizes o-tolidine reversibly with formation of the corresponding quinonediimine, which is visually titrated by the ascorbic acid standard solution.

 

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