Household Salt Iodine Content Estimation with the Use of Rapid Test Kits and Iodometric Titration Methods

Nepal, Ajit; Shakya, Prem Raj; Gelal, Basanta; Lamsal, Madhab; Baral, Nirmal

doi:10.7860/jcdr/2013/5477.2969

Cited by 13 publications

(11 citation statements)

References 5 publications

(2 reference statements)

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“…According to the rapid test kits (RTK) implemented during DHS, and often used in Cambodia, three out of four of the samples tested positive to iodine. A study in Nepal confirmed the accuracy of rapid test kits as a qualitative tool [ 25 ]; other tools are available to quantitatively determine salt iodine levels [ 26 ]. We could therefore extrapolate that the DHS was detecting a large amount of salt with levels of iodine that were insufficient to have a significant impact on UIC.…”

Section: Discussionmentioning

confidence: 99%

Low Urinary Iodine Concentration among Mothers and Children in Cambodia

Laillou¹,

Sophonneary

Kuong

et al. 2016

Nutrients

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A 2014 national assessment of salt iodization coverage in Cambodia found that 62% of samples were non-iodized, suggesting a significant decline in daily iodine intakes. The Cambodian Micronutrient Survey conducted in 2014 (CMNS-2014) permitted obtaining national data on urinary iodine concentrations (UIC) to assess iodine status and whether iodized salt use had an impact. Urine samples were collected from mothers (n = 736) and children (n = 950). The median UIC was 63 µg/L and 72 µg/L in mothers and children respectively. More than 60% of mothers and their children had a UIC < 100 µg/L, thereby indicating a serious public health problem. Iodine status was significantly lower among mothers and children living in rural areas, belonging to the poorest socioeconomic category, or living in a household not using iodized salt. The limited enforcement of the legislation for iodized salt has resulted in a major decrease in the prevalence of iodized salt, which in turn has compromised iodine status in Cambodia. It is essential for the government to enhance enforcement of the iodized salt legislation, and implement short term strategies, such as iodine supplementation, to prevent an increase of severe complications due to iodine deficiency in the Cambodian population.

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Section: Discussionmentioning

confidence: 99%

Low Urinary Iodine Concentration among Mothers and Children in Cambodia

Laillou¹,

Sophonneary

Kuong

et al. 2016

Nutrients

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“…The salt sample was titrated by sodium thiosulfate whose amount was directly proportional to the amount of free liberated iodine. Starch was used as an indicator to mark the end-point of the titration by producing a blue color [20].…”

Section: Measurements Of Iodine In Saltmentioning

confidence: 99%

People's Knowledge and Practice of Salt Iodization, as Well as the Assessment of Iodine Content in Salt in the Cumilla Region of Bangladesh

Jahan

Hossain

Bhuiyan

et al. 2021

JAMPS

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Aim: To evaluate the household iodine content and knowledge, attitude, and behavior regarding salt iodization among the residents of Cumilla, Bangladesh. Subjects and Methods: We conducted a cross-sectional survey of 700 inhabitants in Cumilla's urban and rural areas to determine the iodine concentration of salt they consume. The participants were asked about what they know about iodine deficiency and salt iodization as well as how their salt was packaged and stored. Among them, 338 people provided a sample of salt to be tested of its iodine content by the titrimetric method. Results: 46.57% of people knew that iodization was the best way to prevent iodine deficiency while 35.14% considered salt iodization during purchasing. Most people stored salt in plastic boxes (89.7%) and closed containers (84.14%).Among all participants, only 37.14% of people were aware of the iodine requirement during pregnancy. In urban regions, the median iodine content was 36.76 ppm (OR=0.658, 95% CI, 0.469-0.925), while in rural areas, the median iodine content was 40.92 ppm (OR=1.188, 95% CI, 1.022-1.380). Iodine levels were less than 15 ppm (minimum limit) in 6.8% of samples and greater than 40 ppm (maximum limit) in 56.5%. Only 36.7% of the salt samples contained adequate iodine. Conclusion: An effective and consistent approach for controlling iodine concentration in distributed salt is required at Cumilla, Bangladesh.

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“…2.0 mL of starch paste was added again and the color changed to purplish blue. Titration was continued until the disappearance of the blue purple color (Sullivan et al, 1995;Nepal et al, 2013). This assay was repeated five times for each sample, and for the control sample of salt (iodized salt sample at 40 ppm, bought from the Directorate of Food and Applied Nutrition of Benin).…”

Section: Iodine Content By Iodometric Titrationmentioning

confidence: 99%

Validation of the use of spectrophotometer (WYD iodine checker) for the determination of iodine in food salt

Mizéhoun-Adissoda¹,

Aguèh²,

Yemoa³

et al. 2018

Afr. J. Food Sci.

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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.

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Household Salt Iodine Content Estimation with the Use of Rapid Test Kits and Iodometric Titration Methods

Cited by 13 publications

References 5 publications

Low Urinary Iodine Concentration among Mothers and Children in Cambodia

Low Urinary Iodine Concentration among Mothers and Children in Cambodia

People's Knowledge and Practice of Salt Iodization, as Well as the Assessment of Iodine Content in Salt in the Cumilla Region of Bangladesh

Validation of the use of spectrophotometer (WYD iodine checker) for the determination of iodine in food salt

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