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Characterization of Selenium Species in the Shijimi Clam


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タイトル: Characterization of Selenium Species in the Shijimi Clam
著者: Yoshida, Sakura / Koga, Kaori / Iwataka, Miho / Fuchigami, Takeshi / Haratake, Mamoru / Nakayama, Morio
発行日: 2017年11月 1日
出版者: 日本薬学会 / Pharmaceutical Society of Japan
引用: Chemical and Pharmaceutical Bulletin, 65(11), pp.1045-1050; 2017
抄録: Selenium is an essential trace element for humans and animals. Fish and shellfish are known to be rich in selenium and suppose to be an effective selenium source. In this study, we characterized the selenium species in the Shijimi clam (Corbicula japonica), which is a typical clam eaten in Japan. The Shijimi clam contains a relatively high concentration of selenium (3.5 µg-selenium/g-dry Shijimi). Approximately 30% of the total selenium in the Shijimi clam meat was extractable with water, while selenium in the Shijimi clam was hardly extracted with ethanol, chloroform and hexane. Based on an ultrafiltration study, the molecular mass of the major selenium species in the Shijimi water-extract was estimated to be less than 5000. Because amphoteric selenium species were contained in the Shijimi water-extract, which was indicated by ion-exchange chromatographic separation, an ion-pair reagent was utilized to extract the ionic selenium species into an organic solvent. A matrix assisted laser desorption ionization (MALDI) time of flight (TOF)-mass spectrometric analysis revealed the selenium isotopic pattern involving one selenium atom in a molecule with the 80Se molecular ion peak at m/z 534. This selenium species was mainly found in the visceral part of the Shijimi clam by imaging mass spectrometry.
キーワード: selenium / seafood / imaging mass spectrometry
URI: http://hdl.handle.net/10069/37909
ISSN: 00092363
DOI: 10.1248/cpb.c17-00492
権利: © 2017 The Pharmaceutical Society of Japan
資料タイプ: Journal Article
原稿種類: publisher
出現コレクション:050 学術雑誌論文

引用URI : http://hdl.handle.net/10069/37909

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