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ZHANG Haiwei1; FENG Hui1; FEI Chen1; ZHENG Wenjia2

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更新时间：2021-12-01

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- Journal of Radiation Research and Radiation Processing Vol. 31, Issue 5, Pages: 8-050302(2013)
- 作者机构：
  
  1. 1（安徽农业大学茶与食品科技学院茶叶生物化学与生物技术重点实验室）,合肥,230036
  2. 2（贵州省茶叶科学研究所）,贵阳,550009
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ZHANG Haiwei1, FENG Hui1, FEI Chen1, et al. [J]. Journal of Radiation Research and Radiation Processing 31(5):8-050302(2013)
DOI：

ZHANG Haiwei1, FENG Hui1, FEI Chen1, et al. [J]. Journal of Radiation Research and Radiation Processing 31(5):8-050302(2013) DOI：

摘要

采用60Co γ 射线辐照成品绿茶，分析吸收剂量、剂量率及茶叶含水量对联苯菊酯降解率的影响。吸收剂量设计为3、7、10、15和20 kGy，剂量率为10、30和50 Gy•min−1，茶叶含水量设为5%、8%、10%和17%。结果表明，绿茶中联苯菊酯的降解率随着吸收剂量的增加呈先上升后下降的趋势，吸收剂量在10 kGy时，茶叶中联苯菊酯的降解率较大。随着剂量率的提高，联苯菊酯的降解率呈现直线下降的趋势，在10 Gy•min−1时降解率较大。茶叶含水量与联苯菊酯的降解率呈正相关关系。因此，进行茶叶中农残联苯菊酯辐照降解处理时，采用含水量较高的茶叶，使用较低的剂量率和10 kGy左右的吸收剂量，效果较好。

Abstract

The finished green tea irradiated by 60Co γ-rays was used to study the effects of absorbed dose, dose rate, and the water content of tea on the degradation rate of bifenthrin. The doses of 3 kGy, 7 kGy, 10 kGy, 15 kGy, and 20kGy and the dose rates of 10 Gy•min−1, 30 Gy•min−1, and 50 Gy•min−1 were chosen. And the water contents of green tea were 5%, 8%, 10%, and 17%. The results show that the degradation rate of bifenthrin in green tea increases at first and then decreases with the increasing absorbed doses, and reaches the highest when the dose was 10 Gy. With the increasing dose rates, the degradation rate of bifenthrin plummets, and is relatively higher when the dose rate is 10Gy•min−1 in our experiment. There is a positive correlation between degradation rate of bifenthrin and water content of the green tea. Based on the practical situation, lower dose rate, higher water content and a 10 kGy absorbed dose are suggested to decrease the bifenthrin in green tea.Cited

关键词

茶叶辐照降解农残联苯菊酯

Keywords

TeaIrradiation degradationPesticide residueBifenthrin

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