摘要： 選擇三唑磷、硫丹、氯氟氰菊酯三種農(nóng)藥,在生長(zhǎng)均勻的茶園噴施,采摘施藥后第2、5、9、14天和21天的茶樹鮮葉加工成綠茶,獲得含不同濃度農(nóng)藥殘留的成茶樣品,用氣相色譜法測(cè)定了農(nóng)藥在成茶、茶湯和茶渣中的殘留含量動(dòng)態(tài),研究表明：成茶和茶湯中的殘留水平隨施藥間隔天數(shù)的增加呈逐漸下降趨勢(shì),茶湯中農(nóng)藥殘留的濃度與成茶中的濃度呈正相關(guān)且為線性關(guān)系,平均浸出率分別為29.06％(三唑磷)、5.11％(硫丹)、1.73％(氯氟氰菊酯),不溶于茶湯的農(nóng)藥殘留大部分存留于茶渣中。將人體因飲茶而攝入的農(nóng)藥殘留量與農(nóng)藥ADI相比較,結(jié)果表明飲茶攝入的此三種農(nóng)藥的殘留對(duì)人體健康影響的風(fēng)險(xiǎn)非常小,僅在10-3~10-5 水平上。

關(guān)鍵詞: 農(nóng)藥殘留, 茶葉, 茶湯, MRL, 風(fēng)險(xiǎn)評(píng)價(jià)

Abstract: Three kinds of pesticide (Triazophos, Endosulfan and Lambda-cyhalothrin )were sprayed separately in tea garden. The green shoots were harvested from treated plots at 2, 5, 9, 14 and 21 days after the treatment, and manufactured into green tea. The concentration of the above mentioned pesticides in made tea, tea infusion and infused leaves was determined by gas chromatography. Dissipation behavior of pesticide residue in made tea and tea infusion were investigated. Results indicated that the residue level of pesticide in made tea and tea infusion decreased gradually while the plucking interval increased. The concentration of pesticide residue in tea infusion was positively related with that in made tea. The average extracting percentage of residue from made tea to infusion was 29.06％（triazophos）、5.11％（endosulfan）and 1.73％（lambda-cyhalothrin）respectively,and the insoluble residue remained in infused leaves. In comparing the intake amounts of pesticide residue possibly to human body via the tea infusion drinking with ADI of the pesticides, the results showed that the risk to human health from three kinds of pesticide residue by infusion drinking is very small,which is only ranged in 10-3~10-5 level.

Key words: pesticides residue, tea, tea infusion, MRL, risk assessment

中圖分類號(hào): 

S571.1

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