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 |
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Pages (from-to) | 57-61 |
Number of pages | 5 |
Journal | Analytical Letters |
Volume | 8 |
Issue number | 1 |
DOIs | |
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