Analysis of Iodine Content in Seaweed by GC-ECD and Estimation of Iodine Intake
Open accessAbstract
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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GC-ECD detection is commonly used and has a detection limit of 0.5 mg/kg.
“Gas chromatography-electron capture detector (GC-ECD) detection is commonly used and has a detection limit of 0.5 mg/kg [86] (Table 1).”
From Current Status and Future Trends in Removal, Control, and Mitigation of Algae Food Safety Risks for Human Consumption (2022) · cites this paper as [86]
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- Authors
- Yeh, T. S., Hung, N. H., & Lin, T. C.
- Affiliations
- Meiho University (TW)
- Corresponding author
- Yeh, Tai Sheng
- ORCID
- Yeh, Tai Sheng
- Venue
- Journal of Food and Drug Analysis
- Published
- 2014-06
- Volume
- 22
- Issue
- 2
- Pages
- 189-196
- ISSN
- 1021-9498 (ISSN-L)
- PMC
- PMC9359334
- OpenAlex
- W2002751427
- Cited by
- 87
- References
- 38
- Citations by year
- 2026: 12 · 2025: 8 · 2024: 7 · 2023: 7 · 2022: 12 · 2021: 8 · 2020: 12 · 2019: 6 · 2018: 5 · 2017: 5 · 2016: 2 · 2015: 2 · 2014: 1
- FWCI
- 5.08
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Food and Drug Analysis (publishedVersion)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Department of Health in Taiwan (DOH101-FDA-31204)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
- Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
- Keywords
- iodine content, edible seaweeds, nori, Undaria pinnatifida, kombu, Dietary Reference Intakes, iodine deficiency disorders, iodine excess
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