The determination of the titre of ascorbic acid standard solutions

Abstract

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 quinonediinline, which is visually titrated by the ascorbic acid standard solution.

Original language	English
Pages (from-to)	57-61
Number of pages	5
Journal	Analytical Letters
Volume	8
Issue number	1
DOIs	https://doi.org/10.1080/00032717508060361
Publication status	Published - 1 Jan 1975
Externally published	Yes

Keywords

ascorbic acid
dichromate
o-tolidine
pyrophosphate complex of tervalent manganese
titre

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Spectroscopy
Clinical Biochemistry
Biochemistry, medical
Electrochemistry

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10.1080/00032717508060361

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title = "The determination of the titre of ascorbic acid standard solutions",

abstract = "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 quinonediinline, which is visually titrated by the ascorbic acid standard solution.",

keywords = "ascorbic acid, dichromate, o-tolidine, pyrophosphate complex of tervalent manganese, titre",

author = "J. Barek and A. Berka",

year = "1975",

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AB - 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 quinonediinline, which is visually titrated by the ascorbic acid standard solution.

KW - ascorbic acid

KW - dichromate

KW - o-tolidine

KW - pyrophosphate complex of tervalent manganese

KW - titre

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