海藻中碘的化学种态研究Ⅰ
Determination of chemical species of iodine in algae Ⅰ
-
摘要: 用化学分离结合中子活化法研究了海带、网翼藻、海黍子、松藻、石莼、礁膜和江篱7种海藻中总碘及水溶性碘、有机碘、I-和IO3-等不同形态碘的分布.研究结果表明:不同海藻中碘及其化学种态差别较大,海带中碘含量最高,达734×106(湿重),且99.2%的碘为水溶性碘.其他几种海藻中碘含量较低,且水溶性碘仅占16.5%～40.8%.海藻浸出液中碘主要以I-的形式存在,占浸出总碘量的61.0%～92.7%,其次为有机碘占5.5%～37.4%,IO3-含量最少,仅占1.4%～4.5%.该研究结果提示不同海藻的富碘机制可能不尽相同.从食用的角度看,其中碘的生物利用度也可能有较大的差异.Abstract: The chemical species of iodine in 7 marine algae Cadium fragile, Ulrxi pertusa, Monostroma mtidum, Gracilasia confervoides, Sargassum miyabei yendo, IJictyopteris divaricala and Laminara japonica were studied using neutron activation analysis combined with chemical separation. The contents of total iodine, water soluble iodine, organic iodine. I- and IO3- in 7 algae were determined. The results indicate that the chemical species and contents of iodine in various algae are remarkably different. The highest iodine content of 734×106 Cwet basis) was found in Laminara japonica, and with 99.2% of total iodine being water soluble iodine. The iodine contents in other 6 algae are lower, and the soluble iodine makes up 16%～41% of the total. In the aqueous leachate, iodine is mainly I-,which amounts to 61%～93% of total water soluble iodine, the percentages of organic iodine make up 5.5%～37.4%. The content of IO3- is the lowest, which is 1.4%～4.5% of total iodine.,These suggest that the mechanism of iodine enrichment is possibly different for various algae, and its bioavailabiGty varies as well.
-
Key words:
- Marine algae /
- iodine /
- chemical species /
- neutron activation analysis
-
金骏,林美骄.海藻利用与加工.北京:科学出版社,1993 Alina Kabata-Pendias, Herry K Pendias, Trace Elements in Soil and Plants. 2nd edition, CRC Press, New York and London,1992 王孝举.海带中碘的含量、分布及化学形态研究[硕士学位论文].青岛:中国科学院海洋研究所,1995 增田悦男.海藻中碘的化合物研究(第1报).药学杂志(日文),1934, 54(1):25 增田悦男.海藻中碘的化合物研究(第2报).海藻及其浸出液的透析.药学杂志(日文),1934, 54(5):497 Hirosh Megure-Takeki Abe, Takes Ogasawara Katura Yuzimura. Analysis study of iodine of food substances. Agr. Biol.Chem.,1967, 31(9):999 Riley J P, Chester R. Introduction to Marine Chemistry. Academic Press, London and New York. 1971,206-305 Whyte J N C,Englar J R, Borgmann P E. Compositional changes on freshwater leaching of the marine algae. Can. J. Fish Aquat. Sci.,1981,38, 194-198 Katamine S, Marmiya Y. Sekimoto K et al.Difference in bioavailability of iodine among iodine-rich foods and food colors. Nutr. Rep. Int.,1987, 35(2):289 Xiao lin Hou, Zhifang chaff, Qinfang Qian et al.Determination of bromine and iodine in biological and environmental materials using epithermal neutron activation analysis. Fresenius'J. Anal. Chem.,1997 (in press) 侯小琳.超热中子活化法测定碘和澳.岩矿测试,1995. 14(1):31 高桥武雄著,纪明侯译.海藻工业.北京:轻工业出版社,1961 Ross R R, Chatt A. Microwave acid digestion and pre-concentration neutron activation analysis of biological and diet samples for iodine. Anal. Chem., 1991,63(13).1298 -
计量
- 文章访问数: 966
- HTML全文浏览量: 24
- PDF下载量: 1608
- 被引次数: 0
下载:
