| ~(14)C-代森锰锌在蕃茄和土壤中的残留 |
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| 引用本文： | 王华芳,张连仲,莫汉宏. ~(14)C-代森锰锌在蕃茄和土壤中的残留[J]. 核技术, 1991, 0(1) |
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| 作者姓名： | 王华芳 张连仲 莫汉宏 |
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| 作者单位： | 北京林业大学(王华芳)，中国科学院生态环境研究中心(张连仲)，中国科学院生态环境研究中心(莫汉宏) |
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| 基金项目： | FAO/IAEA组织的国际合作项目 |
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| 摘 要： | ~(14)C-代森锰锌可被蕃茄根叶吸收,在叶片上和土壤中的残留半衰期分别是9.5和7.6d,在土壤中两周内的淋溶距离可达28cm,但90％的代森锰锌残留仍滞留在0—6cm的表层内。代森锰锌在果皮上的沉积和在体内的转移特别是包括乙撑硫脲(ETU)的水溶性代谢物的转移是导致蕃茄果实污染的重要原因。果皮上的代森锰锌残留水平比果肉高,但水洗可除去50％以上。也发现烹饪过程中,20—30％的代森锰锌残留降解生成ETU。
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| 关 键 词： | 同位素示踪技术 代森锰锌残留 ETU |
~(14)C-mancozeb residues in tomato and soil |
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| Wang Huafang. ~(14)C-mancozeb residues in tomato and soil[J]. Nuclear Techniques, 1991, 0(1) |
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| Authors: | Wang Huafang |
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| Affiliation: | Wang Huafang(Beijing Forestry University)Zhang Lianzhong Mo Hanhong(Research Centre jor Eco-environmental Sciences Academia Sinica) |
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| Abstract: | Half-life values for total mancozeb residues on tomato leaves and soil were measured to be 9.5 and 7.6 days respectively. Leaching of residual mancozeb in soil was observed. Mancozeb deposition on the fruit skin, and in particular the water-soluble metabolites like ETU(ethylene thiourea) transferred throughout the plants would be the main sources of contamination of tomato fruits. The fruit skin contained higher levels of residue than the pulp, and by washing with water more than 50% of the residue could be removed. It was also found that 20-30% of the residual mancozeb degraded to ETU during cooking process. |
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| Keywords: | Radiotracer technique Mancozeb residues ETU |
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