Tracing the geographical origin of wakame <i>Undaria pinnatifida</i> and wakame products by using trace element and stable isotope analysis

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  • 加工の影響を受けにくい安定同位体比および微量元素組成によるわかめ加工品の産地判別技術の開発
  • カコウ ノ エイキョウ オ ウケ ニクイ アンテイ ドウイタイヒ オヨビ ビリョウ ゲンソ ソセイ ニ ヨル ワカメ カコウヒン ノ サンチ ハンベツ ギジュツ ノ カイハツ

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Abstract

<p>　We determined stable carbon and nitrogen isotopic compositions (δ13C and δ15N) and 12 element compositions (Mg, P, Ca, V, Mn, Fe, Zn, As, Rb, Sr, Cd, Ba) of raw wakame Undaria pinnatifida, boiled and salted wakame, and cut and dried wakame (boiled and salted wakame is washed, cut and dried) from various cultivation areas in Japan (Sanriku and Naruto areas), China and the Republic of Korea to discriminate their geographical origins. The combination of δ13C and δ15N values and common logarithms of 10 elemental concentrations to that of Sr were selected as the most appropriate model. 90.5% of Sanriku wakame products (n=169), 100% of Naruto wakame products (271), 100% of Chinese wakame products (252) and 83.8% of the Republic of Korea wakame products (74) were correctly classified into the production site. Thus, δ13C and δ15N and common logarithms of 10 elemental concentrations to that of Sr will be potentially useful for discriminating the geographical origin of wakame, boiled and salted wakame, and dried wakame between Sanriku, Naruto, China and the Republic of Korea.</p>

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