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

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. Th...

Full description

Bibliographic Details
Main Authors: Tai Sheng Yeh, Nu Hui Hung, Tzu Chun Lin
Format: Article
Language:English
Published: Elsevier 2014-06-01
Series:Journal of Food and Drug Analysis
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1021949814000155
id doaj-0f79505d5ca5445fab2b9a440ca31a88
record_format Article
spelling doaj-0f79505d5ca5445fab2b9a440ca31a882020-11-25T00:01:36ZengElsevierJournal of Food and Drug Analysis1021-94982014-06-0122218919610.1016/j.jfda.2014.01.014Analysis of iodine content in seaweed by GC-ECD and estimation of iodine intakeTai Sheng YehNu Hui HungTzu Chun LinEdible 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.http://www.sciencedirect.com/science/article/pii/S1021949814000155GC-ECDIodineKombuNoriWakame
collection DOAJ
language English
format Article
sources DOAJ
author Tai Sheng Yeh
Nu Hui Hung
Tzu Chun Lin
spellingShingle Tai Sheng Yeh
Nu Hui Hung
Tzu Chun Lin
Analysis of iodine content in seaweed by GC-ECD and estimation of iodine intake
Journal of Food and Drug Analysis
GC-ECD
Iodine
Kombu
Nori
Wakame
author_facet Tai Sheng Yeh
Nu Hui Hung
Tzu Chun Lin
author_sort Tai Sheng Yeh
title Analysis of iodine content in seaweed by GC-ECD and estimation of iodine intake
title_short Analysis of iodine content in seaweed by GC-ECD and estimation of iodine intake
title_full Analysis of iodine content in seaweed by GC-ECD and estimation of iodine intake
title_fullStr Analysis of iodine content in seaweed by GC-ECD and estimation of iodine intake
title_full_unstemmed Analysis of iodine content in seaweed by GC-ECD and estimation of iodine intake
title_sort analysis of iodine content in seaweed by gc-ecd and estimation of iodine intake
publisher Elsevier
series Journal of Food and Drug Analysis
issn 1021-9498
publishDate 2014-06-01
description 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.
topic GC-ECD
Iodine
Kombu
Nori
Wakame
url http://www.sciencedirect.com/science/article/pii/S1021949814000155
work_keys_str_mv AT taishengyeh analysisofiodinecontentinseaweedbygcecdandestimationofiodineintake
AT nuhuihung analysisofiodinecontentinseaweedbygcecdandestimationofiodineintake
AT tzuchunlin analysisofiodinecontentinseaweedbygcecdandestimationofiodineintake
_version_ 1725441166389805056