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Iodometry and iodimetry are analytical methods used to determine the concentration of oxidizing or reducing agents using iodine. In iodometric titrations, the oxidizing analyte solution is usually acidified and treated with an excess of iodide ions, which generates an equivalent amount of iodine in equilibrium with triiodide. The released iodine is subsequently titrated directly against a standardized reducing agent. As the dilute iodine color becomes pale yellow, a few drops of freshly...
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The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...
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Milk Collection in the Rat Using Capillary Tubes and Estimation of Milk Fat Content by Creamatocrit
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Iodine Content in Milk Alternatives.

Wendy Ma1, Xuemei He2, Lewis Braverman2

  • 11 Department of Biological Sciences, Wellesley College , Wellesley, Massachusetts.

Thyroid : Official Journal of the American Thyroid Association
|July 1, 2016
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Milk alternatives contain significantly less iodine than cow's milk, posing a risk for inadequate iodine intake in individuals avoiding dairy. Further research into plant-based milk iodine content is warranted.

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Area of Science:

  • Nutrition Science
  • Dietary Studies

Background:

  • Iodine is essential for thyroid hormone synthesis and dietary intake.
  • Cow's milk is a major source of iodine in the American diet.

Purpose of the Study:

  • To quantify iodine levels in various milk alternatives.
  • To compare iodine content in milk alternatives to cow's milk.

Main Methods:

  • Spectrophotometric analysis using the Sandell-Kolthoff reaction.
  • Analysis of 30 brands of milk alternatives from 16 companies.

Main Results:

  • Milk alternatives averaged 3.1 ± 2.5 μg/250 mL iodine.
  • This is substantially lower than iodine levels typically found in cow's milk.

Conclusions:

  • Milk alternatives provide insufficient iodine compared to cow's milk.
  • Individuals reducing dairy intake may face iodine deficiency risks.