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| 新鲜海带中碘的含量与分布 |
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王孝举, 娄清香, 严小军
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中国科学院海洋研究所
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| 摘要: |
| 海带中含有高浓度的碘是其独特的化学组成特点,历来被海藻学家所重视(Tang and Chang, 1935, 1936; Black, 1948, 1949; Klemperer, 1957; Fernandez et al., 1964:Dave et al., 1973; Law, 1975; Solimabi and Das, 1977; Yamamoto et al., 1984:Doshi and Joshi,1989; Mairh et al.,1989),但是几乎所有的有关研究方法都基于化学滴定,在材料上局限于海藻干品,另外海带样品含有大量的褐藻多糖以及多酚类化合物,能够包溶部分碘离子及碘单质,因此用常规的化学滴定法误差较大,从而导致试验结果的非重复性和非可靠性。本文利用碘离子选择电极法,直接在样品溶液中测定,不必经过离心、氧化还原等一系列复杂的步骤,测定了新鲜海带中不同部位碘的含量和分布,为进一步研究海带中碘的化学存在形态提供了理论数据。 |
| 关键词: 海带、碘 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第2746号 |
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| CONTENTS AND DISTRIBUTION OF IODINE IN FRESH LAMINARIA JAPONICA |
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Wang Xiaoju, Lou Qingxiang, Yan Xiaojun
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Institute of Oceanology,Chinese Academy of Sciences
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| Abstract: |
| Laminaria japonica was collected from the coast of Qingdao from April to July,1995. Determination of the iodine contents of different parts in the same sample by an iodine ion-elective electrode showed that iodine was distributed throughout Laminaria japonica and could constitute 0.133%o of fresh weight. The iodine contents varied greatly within the same sample. The frond was richer in iodine than the stipe, especially in the top of frond, whose contents could reach 0.183% of fresh weight. This distribution characteristics relates to the plant metabolism. The more active metabolism some parts of Laminaria japonica have, the more iodine they accumulate. |
| Key words: FRESH LAMINARIA JAPONICA,IODINE |
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