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 | |
| Publication status | Published - 1 Jan 1975 |
| Externally published | Yes |
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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
Cite this
The determination of the titre of ascorbic acid standard solutions. / Barek, J.; Berka, A.
In: Analytical Letters, Vol. 8, No. 1, 01.01.1975, p. 57-61.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The determination of the titre of ascorbic acid standard solutions
AU - Barek, J.
AU - Berka, A.
PY - 1975/1/1
Y1 - 1975/1/1
N2 - 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.
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
UR - http://www.scopus.com/inward/record.url?scp=84915020878&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84915020878&partnerID=8YFLogxK
U2 - 10.1080/00032717508060361
DO - 10.1080/00032717508060361
M3 - Article
VL - 8
SP - 57
EP - 61
JO - Analytical Letters
JF - Analytical Letters
SN - 0003-2719
IS - 1
ER -