Analysis of iodine content in seaweed by GC-ECD and estimation of iodine intake

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ID: 181750
2014
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Abstract
Edible seaweed products have been consumed in many Asian countries. Edible seaweeds accumulate iodine from seawater, and are therefore a good dietary source of iodine. An adequate consumption of seaweed can eliminate iodine deficiency disorders, but excessive iodine intake is not good for health. The recommended dietary reference intake of 0.15 mg/d and 0.14 mg/d for iodine has been established in the United States and Taiwan, respectively. In this study, 30 samples of seaweed were surveyed for iodine content. The samples included 10 nori (Porphyra), 10 wakame (Undaria), and 10 kombu (Laminaria) products. The iodine in seaweed was derivatized with 3-pentanone and detected by gas chromatography-electron capture detector (GC-ECD). The method detection limit was 0.5 mg/kg. The iodine content surveyed for nori was 29.3–45.8 mg/kg, for wakame 93.9–185.1 mg/kg, and for kombu 241–4921 mg/kg. Kombu has the highest average iodine content 2523.5 mg/kg, followed by wakame (139.7 mg/kg) and nori (36.9 mg/kg). The GC-ECD method developed in this study is a low-cost alternative to inductively coupled plasma-optical emission spectroscopy for iodine detection in seaweeds. The iodine intake from seaweed in the current survey was calculated and compared with the iodine dietary reference intake of Taiwan. The risk and benefit of seaweed consumption is also discussed.
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yeh2014analysisjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yeh, Tai Sheng;Hung, Nu Hui;Lin, Tzu Chun;
Journal journal of food and drug analysis
Year 2014
DOI
DOI not found
URL
http://www.sciencedirect.com/science/article/pii/S1021949814000155
Keywords
chemistry Organic Chemistry Therapeutics. Pharmacology Technology (General) Chemical technology Science (General) Science Aquaculture. Fisheries. Angling toxicology. poisons nutrition. foods and food supply energy industries. energy policy. fuel trade

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