熱ルミネッセンス法による国産照射馬鈴薯の検知 Detection of the Irradiated Domestic Potato by Thermoluminescence Analysis

この論文にアクセスする

この論文をさがす

著者

抄録

熱ルミネッセンス法を国内産馬鈴薯の検知に適用するための条件を確立することを目的とし,国内の9箇所の産地で収穫された馬鈴薯に50∼150Gyのガンマ線を照射して,そのTLスペクトルを測定した.また,照射後の流通の過程におけるTL発光強度の減衰について検討した.そして,その結果以下のことが明らかになった.<br>(1) TLスペクトルは産地によってその形状,単位重量あたりの発光量にかなり差があり,これは産地の土壌に含まれるSiO<sub>2</sub>以外の要素(珪酸塩等)に起因する.<br>(2) TL比を用いることにより,照射,非照射の判別とある程度線量の推定が可能である.<br>(3) 190°C付近をピークとする低温側のTL発光強度は照射直後から急激に減少するが,290°C付近をピークとする高温側のTL発光強度は比較的安定なため,150Gy程度照射された馬鈴薯の場合,日光下等かなり悪い条件で貯蔵されたものにおいても高い精度で検知することができる.<br>(4) 国内で実際に流通している,北海道士幌産放射線照射馬鈴薯についても高い精度で検知することができる.

The applicability of thermoluminescence (TL) method to the detection of Japanese domestic potatoes was examined. Potatoes of nine different origins were exposed to gamma rays at 0 to 150Gy and the minerals separated from the potatoes were subjected to the TL measurements. The fading effects of TL emission intensity were also examined during the storage of post-irradiation period. The irradiated samples gave large intensity of TL signals compared with those of non-irradiated ones, and there were proportionalities in the intensity and the dose. The quantum yield of the TL emission for each unit weight and shape of glow curves were varied in the samples from different producing regions hence the irradiated samples were difficult to be detected by using those parameters. TL ratios obtained from the irradiated samples in all regions were 0.15-1.00 and those obtained from non-irradiated samples were less than 0.15. Therefore, the irradiated and non-irradiated samples can be distinguished by normalization (TL ratio). The signal intensity decreased with the storage time, and the reduction of signal was more rapidly observed in the sample stored under light condition than that in darkness. However, the TL ratio of the samples irradiated at 150Gy and stored for five months could be distinguished from those of non-irradiated samples. It was also possible to apply this method to the detection of the domestic potatoes which irradiated in a commercial facility and purchased at a local market.

収録刊行物

  • 日本食品科学工学会誌 : Nippon shokuhin kagaku kogaku kaishi = Journal of the Japanese Society for Food Science and Technology

    日本食品科学工学会誌 : Nippon shokuhin kagaku kogaku kaishi = Journal of the Japanese Society for Food Science and Technology 51(6), 298-303, 2004-06-15

    公益社団法人 日本食品科学工学会

参考文献:  15件中 1-15件 を表示

被引用文献:  4件中 1-4件 を表示

各種コード

  • NII論文ID(NAID)
    10013145558
  • NII書誌ID(NCID)
    AN10467499
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    1341027X
  • NDL 記事登録ID
    6996706
  • NDL 雑誌分類
    ZP34(科学技術--食品工学・工業)
  • NDL 請求記号
    Z17-126
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ