Determination of ascorbic acid by iodate using iodine cyanide end point; indirect determination of vanadium, and colorimetric determination of ascorbic acid

1964 ◽  
Vol 199 (5) ◽  
pp. 367-370 ◽  
Author(s):  
C. N. Murty ◽  
M. G. Bapat
Keyword(s):  
Ascorbic Acid ◽  
Colorimetric Determination ◽  
Indirect Determination ◽  
End Point

Liquid Chromatography, Microfluorometry, and Dye-Titration Determination of Vitamin C in Fresh Fruit and Vegetables

1983 ◽  
Vol 66 (6) ◽  
pp. 1377-1379
Author(s):  
Ron B H Wills ◽  
Pushparany Wimalasirl ◽  
Heather Greenfield
Keyword(s):  
Ascorbic Acid ◽  
Liquid Chromatography ◽  
Vitamin C ◽  
Dehydroascorbic Acid ◽  
Fresh Fruit ◽  
Fruit And Vegetables ◽  
End Point ◽  
Liquid Chromatographic ◽  
Good Agreement

Abstract The vitamin C content of several fresh fruit and vegetables was determined by a liquid chromatographic (LC) method which gave simultaneous separate values for ascorbic acid and dehydroascorbic acid (DHA) and by the official AOAC methods of microfluorometry and dye-titration. The levels of ascorbic acid obtained by LC and dye-titration were in good agreement, except for a few colored products where it was difficult to determine the end point of the titration. The combined values for ascorbic acid and DHA obtained by LC and microfluorometry were in agreement for most produce, but for about one-third of the samples, the values obtained by microfluorometry were significantly higher.

THE COLORIMETRIC DETERMINATION OF PLATINUM WITH 5-(p-DIMETHYLAMINOBENZYLIDENE)-RHODANINE

1963 ◽  
Vol 41 (3) ◽  
pp. 667-670 ◽  
Author(s):  
Frances E. Piercy ◽  
D. E. Ryan
Keyword(s):  
Ascorbic Acid ◽  
The Other ◽  
Colorimetric Determination ◽  
Platinum Metals ◽  
Low Concentrations ◽  
Fold Excess

5-(p-Dimethylaminobenzylidene)-rhodanine is used to determine 0.5 to 6 p.p.m. of platinum colorimetrically, after reduction of platinum IV with ascorbic acid. Platinum can be determined in the presence of a 10-fold excess of palladium; low concentrations of the other platinum metals, except rhodium, do not seriously interfere.

Colorimetric Determination of Ascorbic Acid

1954 ◽  
Vol 26 (9) ◽  
pp. 1521-1522 ◽  
Author(s):  
Morton. Schmall ◽  
C. W. Pifer ◽  
E. G. Wollish ◽  
Robert. Duschinsky ◽  
Harold. Gainer
Keyword(s):  
Ascorbic Acid ◽  
Colorimetric Determination

Colorimetric determination of ascorbic acid

1973 ◽  
Vol 61 (6) ◽  
pp. 901-906 ◽  
Author(s):  
M. H. Hashmi ◽  
Maqbool Ahmad Shahid ◽  
M. Ahsan Akhtar ◽  
N. A. Chughtai
Keyword(s):  
Ascorbic Acid ◽  
Colorimetric Determination
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