Abstract
A rapid qualitative test which may be used for the detection of adulteration of thyroid with water‐soluble inorganic iodide is presented. The test consists of shaking the thyroid with saturated zinc sulfate, filtering, and adding sodium nitrite, dilute sulfuric acid and starch solution to the filtrate. A blue color develops with samples containing only 0.006 per cent inorganic iodine.
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