| Titre |
Validation of the use of spectrophotometer (WYD iodine checker) for the determination of iodine in food salt |
| Auteurs |
Carmelle Mizehoun-Adissoda [1],
Agueh Victoire [2],
YEMOA Loconon Y. Achille [3],
Segla Boris [4],
ALIHONOU FLORENCE NATHALIE YACOBA [5],
JOSSE Roger Gérard [6],
Houinato Dismand [6],
DESPORT Jean-Claude [6],
Bigot André [6],
|
| Journal: |
African Journal of Food Science |
| Catégorie Journal: |
Internationale |
| Impact factor: |
0 |
| Volume Journal: |
12 |
| DOI: |
|
| Resume |
The iodine content in food salt is generally determined qualitatively using rapid test kits or
quantitatively by iodometric titration (reference method). Spectrophotometric analysis is one of the
recent developed quantitative methods, which has the advantage of being simple, robust and more
convenient for the laboratory technician. However, there are few comparative studies between this
method and the reference method. The aim of this study was to evaluate the agreement between
spectrophotometric and iodometric titration methods. From May to October 2013, 117 salt samples were
collected in the households of Glazoué’s town (Benin), through a three-stage sampling. Samples were
assayed by iodometric titration and by a portable spectrophotometer (WYD Iodine Checker). The
agreement between results of the two methods was performed using Bland-Altman plots. The mean
levels of iodine in salt samples were 28.2±14.0 and 28.4±14.0 ppm by iodometric titration and
spectrophotometry respectively. There is an excellent correlation between the results of both methods
(r= 0.97, p< 0.001). The agreement between the two methods gave a mean difference of d= 0.2 ppm,
within the limits: d ± 2 sd= -6.2 and 6.5 ppm. This study showed that the spectrophotometric method
can replace the iodometric titration for iodine analysis in dietary salt. This method is more convenient,
uses simple laboratory procedures and can be popularized. |
| Mots clés |
Spectrophotometry, Iodometric titration, food salt, Iodine. |
| Pages |
15 - 20 |
| Fichier |
 (PDF) |