| 福建茶园茶叶中六六六和滴滴涕残留水平及来源分析 |
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| 引用本文： | 易志刚,杨雯清,吴燕华,杜志伟,毕峻奇.福建茶园茶叶中六六六和滴滴涕残留水平及来源分析[J].农业环境科学学报,2012,31(1):24-29. |
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| 作者姓名： | 易志刚 杨雯清 吴燕华 杜志伟 毕峻奇 |
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| 作者单位： | 福建农林大学资源与环境学院,福州,350002 |
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| 基金项目： | 国家自然科学基金(40971260) |
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| 摘 要： | 运用气相色谱-电子捕获检测器(GC-μECD)分析了福建茶园茶叶中六六六(HCHs)和滴滴涕(DDTs)等有机氯农药(OCPs)的分布、组成和来源。结果表明,∑OCPs浓度为0.764～10.561ng.g-1,永泰最高,福鼎最低,一般而言,老叶中∑OCPs浓度高于嫩叶;∑HCHs浓度为0.373～7.427ng.g-1,永泰最高,政和最低,老叶中HCHs浓度显著高于嫩叶;茶叶中HCHs同系物以γ-HCH为主,占总量的51.3%～94.1%;α-/γ-HCH表明所有茶园均存在林丹的使用或输入,β-(/α+γ)-HCH表明所有茶园均非HCHs历史污染,可能存在HCHs其他新的来源。∑DDTs浓度为0.123～5.168ng.g-1,政和最高,福鼎最低,老叶和嫩叶中无显著差异;与土壤类似,茶叶中DDTs同系物以p,p′-DDT和o,p′-DDT为主,两者之和占总量的67.3%～96.0%;p,p′-DDE/p,p′-DDT表明,除福鼎、永泰和安溪外,其他茶园均存在工业DDTs的使用或输入;o,p′-DDT/p,p′-DDT表明,除政和外,其他茶园均存在大量的三氯杀螨醇的使用或输入,以安溪较为严重。
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| 关 键 词： | 茶叶 六六六 滴滴涕 茶园 福建 |
Residues and Sources of HCHs and DDTs in Tea Leaves in Fujian Tea Gardens |
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| YI Zhi-gang
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YANG Wen-qing
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WU Yan-hua
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DU Zhi-wei
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BI Jun-qi.Residues and Sources of HCHs and DDTs in Tea Leaves in Fujian Tea Gardens[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2012,31(1):24-29. |
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| Authors: | YI Zhi-gang YANG Wen-qing WU Yan-hua DU Zhi-wei BI Jun-qi |
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| Institution: | (College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,China) |
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| Abstract: | Seven tea gardens in Fuding(FD),Fuzhou(FZ) and Yongtai(YT) in the east,Anxi(AX) in the south,Shanghang(SH) in the west,Zhenghe(ZH) in the north,and Youxi(YX) in the middle of Fujian Province were selected,and GC-μECD was employed to determine the concentration,the composition and the source of the organochlorine pesticides(OCPs),such as HCHs and DDTs in tea leaves.The results showed that the concentrations of ∑OCPs ranged from 0.764 ng·g-1 to 10.561 ng·g-1,with the highest in YT and the lowest in FD.Generally,∑OCPs in old leaves were higher than those in new leaves.∑HCHs ranged from 0.373 ng·g-1 to 7.427 ng·g-1,with the highest in YT and the lowest in ZH.Generally,∑HCHs in old leaves were significantly higher than those in new leaves.γ-HCH accounted for the highest ratio to the total HCHs in tea leaves,with the values of 46.9%~93.9%.The ratios of α-/γ-HCH suggested the newly input or use of lindane in all the tea gardens,and the ratios of β-/(α+γ)-HCH implied that they were no historic pollution but new sources of HCHs in all the tea gardens.∑DDTs ranged from 0.123 ng·g-1 to 5.168 ng·g-1,with the highest in ZH and the lowest in FD.They were no significant variances between old leaves and new leaves for ∑DDTs.Similar to those in soils,the main isomers were o,p’-DDT and p,p’-DDT for all the DDTs isomers,with the ratios of 67.3%~96.0%.The ratios of p,p’-DDE/p,p’-DDT suggested the use or input of technical DDTs in the tea gardens except for those in FD,YT and AX.The ratios of o,p’-DDT/p,p’-DDT indicated that large amount use or input of dicofol in the tea gardens except for those in ZH,especially in AX. |
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| Keywords: | tea HCHs DDTs tea garden Fujian |
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