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Mar. Drugs 2006, 4(4), 290-297; doi:10.3390/md404290

Article

Natural Abundance 14C Content of Dibutyl Phthalate (DBP) from Three Marine Algae

Michio Namikoshi ^1,* , Takeshi Fujiwara ² , Teruaki Nishikawa ³  and Kazuyo Ukai ¹

¹ Tohoku Pharmaceutical University, Aoba-ku, Sendai 981-8558, Japan ² Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Minato-ku, Tokyo 108-8477, Japan ³ The Nagoya University Museum, Chikusa-ku, Nagoya 464-8601, Japan

* Author to whom correspondence should be addressed.

Received: 19 September 2006 / Accepted: 31 October 2006 / Published: 1 November 2006

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Abstract: Analysis of the natural abundance ¹⁴C content of dibutyl phthalate (DBP) from two edible brown algae, Undaria pinnatifida and Laminaria japonica, and a green alga, Ulva sp., revealed that the DBP was naturally produced. The natural abundance ¹⁴C content of di-(2-ethylhexyl) phthalate (DEHP) obtained from the same algae was about 50-80% of the standard sample and the ¹⁴C content of the petrochemical (industrial) products of DBP and DEHP were below the detection limit.

Keywords: brown alga; green alga.; 14C natural abundance; dibutyl phthalate; di-(2- ethylhexyl) phthalate

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