Estimating the Geographical Origin of Food Products by Stable Isotope and Trace Element Analyses

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  • SUZUKI Yaeko
    Food Research Institute, National Agriculture and Food Research Organization (NARO)

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  • 軽元素安定同位体比分析及び微量元素分析による食品の産地判別
  • ケイゲンソ アンテイ ドウイタイヒ ブンセキ オヨビ ビリョウ ゲンソ ブンセキ ニ ヨル ショクヒン ノ サンチ ハンベツ

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Abstract

<p>The cultivation area is an important factor for determining the market value of food materials. Thus, the development of the analytical methods for tracing geographical origin of the foods materials is strongly required. We have reported on applications to the discrimination of geographical origin of Japanese food materials (e.g. rice, wheat, apple, honey, beef, wakame products and eel products) by an analytical method which focusing on stable isotope analysis (e.g. δ13C, δ15N and δ18O) and trace element analysis. On the other hand, despite rapidly growing applications on isotope analysis in food sciences, the lack of a reliable technique for the measurements is very much regrettable and should be improved immediately. We have presented the results of an inter-laboratory test on the EA/IRMS determination of δ13C, δ15N and δ18O values in organic compounds. The δ18O values of samples including nitrogen showed a large variation among laboratories. This may be caused by a large contamination of N2 to the CO peak on the EA/IRMS chromatogram.</p>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 68 (9), 671-682, 2019-09-05

    The Japan Society for Analytical Chemistry

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