Estimation of total as well as bioaccessible levels and average daily dietary intake of iodine from Japanese edible seaweeds by epithermal neutron activation analysis

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• 作者：M. Fukushima (1)
  A. Chatt (2)
  
• 关键词：Total iodine ; Bioaccessible iodine ; Average intake ; Japanese seaweeds ; Sea mustard ; Japanese tangle
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2012
• 出版时间：December 2012
• 年：2012
• 卷：294
• 期：3
• 页码：471-478
• 全文大小：491KB
• 参考文献：1. The Japanese Society of Nutrition and Food Science. The sixth revision of Japanese recommended dietary allowances. dietitian.or.jp/english/jp_health_nutrition/sixthrevision.html">http://www.dietitian.or.jp/english/jp_health_nutrition/sixthrevision.html
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• 作者单位：M. Fukushima (1)
  A. Chatt (2)
  
  1. Department of Basic Sciences, Faculty of Science and Engineering, Ishinomaki Senshu University, Minamisakai, Ishinomaki, Miyagi, 986-8580, Japan
  2. Department of Chemistry, Trace Analysis Research Centre, Dalhousie University, Halifax, NS, B3H 4J3, Canada
  
• ISSN：1588-2780

文摘

An epi-thermal instrumental neutron activation analysis (EINAA) method in conjunction with Compton suppression spectrometry (EINAA-CSS) was used for the determination of total iodine in eight different species of edible seaweeds from Japan. This method gave an absolute detection limit of about 2?μg. The accuracy of the method was evaluated using various reference materials and found to be generally in agreement within ±6% of the certified values. The longitudinal distributions of iodine at different growing stages in Japanese sea mustard and tangle seaweeds were investigated. For a 150-cm-high tangle, the highest concentration (5,360?mg/kg) of iodine was found at the root, then decreased slowly to 780?mg/kg in the middle portion (60-5?cm), and increased to 2,300?mg/kg at the apex. On the other hand, for a 190-cm-high sea mustard the highest levels of iodine were found both at the roots (164?mg/kg) and apex (152?mg/kg) with lower values (98?mg/kg) in the middle section. In order to estimate the bioaccessible fraction of iodine, seaweeds were digested by an in vitro enzymolysis method, dietary fibre separated from residue, and both fractions analyzed by EINAA-CSS. The average daily dietary intakes of total (0.14?mg) as well as bioaccessible fraction (0.12?mg) of iodine from the consumption of sea mustards were estimated.