Determination of Iodine content in Salt samples commercially available in Debre Tabor town, South Gondar, Ethiopia
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Date
2020-03
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Addis Abeba University
Abstract
Background: Iodine is essential trace element important for synthesis of thyroid hormones.
Human body cannot synthesize iodine; it is obtained from different sources. Inadequate
consumption of iodine leads to iodine deficiency disorder. Iodine deficiency disorder is major
global public health problem and it is possible to root out this problem by universal salt
iodization.
Objective: The main aim of this study is to determine iodine content in salt samples
commercially available in Debre Tabor town using rapid test kit (RTK) and iodometric titration.
Methodology: The study was conducted in Debre Tabor town from December 16 to 29, 2019
and cross- sectional study was used to determine the iodine content in salt samples purchased
from different shops of Debre Tabor town. All statistical analyses were analyzed using the
software, Statistical Package for the Social Science (SPSS)
version
21 and results were expressed
as mean ± standard deviation. Statistical difference between mean iodine content of salt was
analyzed by One Way Analysis of Variance (ANOVA) and statistical significance was accepted
at p < 0.05.
Result: Iodine content of different salt samples determined by iodometric titration was found
between 11.435 ± 0.441 mg/kg to 37.252 ± 0.603 mg/kg. The highest value was recorded for
Risa (37.252 ± 0.603 mg/kg) while the lowest value for Ediget salt (11.435 ± 0.441 mg/kg).
Iodine content of salts determined by rapid test kit (RTK) showed that for almost all of salt
samples iodine content was >15 mg/kg except for Ediget salt <15 mg/kg. Of ten salt samples (n
=10) collected, according to WHO, (n =9), 90% were adequately iodized (15-40 mg/kg), and one
salt sample (n =1), 10% was insufficiently iodized (5-14.9 mg/kg). According to iodization level
set in Ethiopia (36-48 mg/kg) only one salt sample (Risa, 37.252 ± 0.603 mg/kg) was adequately
iodized.
Conclusion: The iodine content of salts available in Debre Tabor town was determined using
rapid test kit and iodometric titration. Different salt brands contained different amount of iodine
and almost all of salt samples collected from study area did not contain adequate amount of
iodine according to iodization level set in Ethiopia. But most of salt samples contained adequate
level of iodine according to WHO’s level of iodization.
Description
Keywords
Iodine, Iodine deficiency disorder, Iodometric titration, Rapid test kit