Background correction method for the determination of ascorbic acid in soft drinks, fruit juices and cordials using direct ultraviolet spectrophotometry

The Analyst ◽  
1986 ◽  
Vol 111 (6) ◽  
pp. 665 ◽  
Author(s):  
Oi-Wah Lau ◽  
Shiu-Fai Luk ◽  
Kit-Sum Wong
Keyword(s):  
Ascorbic Acid ◽  
Correction Method ◽  
Soft Drinks ◽  
Fruit Juices ◽  
Background Correction ◽  
Ultraviolet Spectrophotometry

Spectrophotometric Determination of Ascorbic Acid in Canned Fruit Juices, Cordials, and Soft Drinks with Iron(III) and 1,10-Phenanthroline as Reagents

1987 ◽  
Vol 70 (3) ◽  
pp. 518-520 ◽  
Author(s):  
Oi-Wah Lau ◽  
Shiu-Fai Luk
Keyword(s):  
Ascorbic Acid ◽  
Ascorbic Acid Content ◽  
Calibration Graph ◽  
Soft Drinks ◽  
Fruit Juices ◽  
Background Correction ◽  
Reduction Of Iron ◽  
Wide Range ◽  
Canned Fruit

Abstract A simple and accurate spectrophotometric method has been developed for the determination of ascorbic acid in canned fruit juices, cordials, and soft drinks, based on the reduction of iron(III) by ascorbic acid to iron(II), which is then complexed with 1,10-phenanthroline. Background correction is necessary for most samples and can be achieved by copper(II)-catalyzed oxidation of the acid. The calibration graph was linear from 0 to 8 μg/mL of ascorbic acid with a slope of 0.12/ppm. The precision for the determination of ascorbic acid in a lemon drink containing 210 μg/mL of the acid was 0.9%. Many ingredients commonly found in fruit juices, cordials, and soft drinks do not interfere; however, tannic acid, pyrogallol, and sulfite interfere with the method. A wide range of samples was analyzed for ascorbic acid content by the proposed method. The samples included mango and lemon tea drinks and also grapefruit juices, for which no background correction is needed.

A screening method for the determination of ascorbic acid in fruit juices and soft drinks

2009 ◽  
Vol 116 (2) ◽  
pp. 509-512 ◽  
Author(s):  
A. Rodríguez-Bernaldo de Quirós ◽  
M. Fernández-Arias ◽  
J. López-Hernández
Keyword(s):  
Ascorbic Acid ◽  
Screening Method ◽  
Soft Drinks ◽  
Fruit Juices

scholarly journals Paper-based platforms with coulometric readout for ascorbic acid determination in fruit juices

The Analyst ◽  
2020 ◽  
Vol 145 (9) ◽  
pp. 3431-3439
Author(s):  
Estefanía Nunez-Bajo ◽  
M. Teresa Fernández-Abedul
Keyword(s):  
Ascorbic Acid ◽  
Low Cost ◽  
Fruit Juices ◽  
Ascorbic Acid Determination ◽  
Cost Determination ◽  
Acid Determination

Paper-based electrochemical platforms with coulometric readout are employed for fast and low cost determination of ascorbic acid in commercial juice samples.

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