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中国农业科学院茶叶研究所陈红平研究员团队:即饮茶饮中农药残留的污染水平及风险评估

  • 2026-05-09 08:35:43
中国农业科学院茶叶研究所陈红平研究员团队:即饮茶饮中农药残留的污染水平及风险评估
中国农业科学院茶叶研究所陈红平在《Food Chemistry》(IF 9.8)上发表了题为“Pollution level and risk assessment of pesticide residues in ready-to-drink tea beverages”的研究论文。本研究通过UPLC-MS/MS监测123款RTD茶饮中的141个农药残留。结果显示,在67.5%的样本中检测到9种农药,浓度介于0.21–5.33 μg/L范围内,其中二甲呋喃和对乙酰氨基苯id的检测频率最高。即饮乌龙茶饮品中农药检测率最高,其次是即饮绿茶、茉莉茶、红茶、白茶和普洱茶。基于危害指数(HQ)和危害指数(HI)评估,检测到九种农药对人体健康的风险非常低(<0.1),表明RTD茶饮中农药残留的风险对成人和儿童均可接受。因此,本研究为RTD茶饮的饮食暴露风险评估提供了基本数据。

如图1A所示,基质效应范围为−20%至20%,其中122种农药(86.5%)表现为可忽略或较低,而18种农药(12.8%)的ME介于−50%至−20%之间,表示介质,单色磷低于−50%的活性因子在RTD绿茶饮品中表现较强.此外,大多数化合物的ME在六种RTD茶饮中被发现相对较弱,尽管它们之间存在一些差异。因此,采用与检测样品相同类型的基质配对校准,用于化合物的定量分析。

LOQ基于信噪比(S/N)10计算,为0.2–5 μg/L。在RTD绿茶饮料基质中进行了1 μg/L和10 μg/L峰值水平的回收实验,共进行了三次重复,以确定平均回收率和相对标准差(RSD),以评估改进方法的准确性和精度。如图1B所示,10 μg/L刺犬实验中133种分析物的平均回收率在70%至120%之间,而8种分析物的平均回收率低于70%,包括乙酸乙酯、二甲酮、异戊磷甲基、硝苯吡酯、奥米托酸盐、葍酸盐和磺基苯丙。这可能归因于这些农药较高的水溶性,在QuEChERS提取过程中容易流失。在1 μg/L的尖峰水平下,135种分析物的平均回收率也在70%至120%之间,但6种分析物的回收率仍低于70%,包括乙酰酸盐、异戊磷-甲基、硝化吡酯、葦酸盐和磺基苯丙。如图1C所示,所有分析物的RSD均低于20%。这些结果表明该方法对所有分析物都提供了良好的准确性和精度。

Fig.1. (A) Matrix effects of 141 pesticides analyzed using UPLC-MS/MS; (B) Recoveries and (C) RSDs of pesticides at 1 μg/L and 10 μg/L.

RTD茶饮通过提取、澄清及其他工艺由茶叶制成。在一定程度上,RTD茶饮中的农药残留水平可能会受到生茶中残留水平的影响。本研究收集了RTD红茶饮品(n=22)、RTD绿茶饮品(n=16)、RTD茉莉茶饮品(n=18)、RTD普洱茶饮品(n=10)、RTD乌龙茶饮品(n=51)和RTD白茶饮品(n=6),以探讨不同茶叶类型对RTD茶饮品质的影响,结果见图2.RTD茶饮中含有农药的RTD茶饮数量分别为13、12、3、39、12和3。在分析的六种RTD茶饮中,每种茶饮的农药总检出率如下:RTD乌龙茶饮品(76.5%)>RTD绿茶饮品(75.0%)>RTD茉莉花茶饮品(66.7%)>RTD红茶饮品(59.1%)>RTD白茶饮品(50.0%)>RTD普洱茶饮品(30.0%)。RTD乌龙茶饮品(1.24 μg/L)和RTD绿茶饮品(1.24 μg/L)的中位残留量最高,其次是RTD茉莉茶饮品(0.79 μg/L)、RTD红茶饮品(0.74 μg/L)和RTD白茶饮品(0.54 μg/L)。RTD普洱茶的整体中位数残留水平最低。总平均浓度如下:RTD乌龙茶饮品(2.21微克/升)>RTD绿茶饮品(1.78微克/升)>RTD茉莉花茶饮品(1.18微克/升)>RTD红茶饮品(0.98微克/升)>RTD白茶饮品(0.83微克/升)>RTD普洱茶饮品(0.30微克/升)。

Fig. 2. (A) Proportion of different residue rang in six types of RTD tea beverages; (B) Detection rates and average residue levels of pesticide residues in six types of RTD tea beverages. Bar chart represents detection rate of pesticides, and dot-line plot represents the average residual concentration. PTB: RTD Pu'er tea beverage; WTB: RTD white tea beverage; BTB: RTD black tea beverage; JTB: RTD jasmine tea beverage; GTB: RTD green tea beverage; OTB: RTD oolong tea beverage. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)

该研究改良的QuEChERS方法成功开发并实施,通过UPLC-MS/MS检测并定量了123款RTD茶饮中的141种农药残留。市场上67.5%的RTD茶饮含有9种农药残留,包括苯呐呋喃、对乙酰氨基冴啶、吡氯虫菊、氟哌啶、卡苯达齐姆、硫甲氧膴苣、硝吡啶、噻啉和苯甲酸酯,残留量在0.21微克至5.33微克/升之间。与此同时,与RTD绿茶、茉莉茶、红茶、白茶和普洱茶饮品相比,乌龙茶的农药残留量最高。此外,通过确定性模型计算了成人和儿童九种农药的累计饮食风险。结果显示,RTD茶饮饮的累计健康风险在可接受范围内(HI < 1)。然而,儿童的风险管理措施应进一步加强。结论表明,市场上RTD茶饮中检测到农药残留,表明亟需建立RTD茶饮农药残留控制标准。本研究为消费者合理饮用RTD茶饮提供了参考,并为RTD茶饮的饮食暴露风险评估提供了基本信息。

撰稿:杨铭
审核:刘广洋
原文链接:https://www.sciencedirect.com/science/article/pii/S0308814626013841

免责声明
本文仅供科研分享,助力科学传播,不做盈利使用,如有侵权,请联系后台删除。部分图文资料来自网络,仅供科研分享,助力科学传播,不做盈利使用。转载内容不代表本公众号的观点和立场,本公众号不对其准确性、可靠性提供保证,仅供读者参考。如涉及侵权或未授权发布,请联系后台,我们将及时更正、删除,谢谢。
联系人:   刘广洋,中国农业科学院蔬菜花卉研究所质检中心,liuguangyang@caas.cn

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  1. CONNECT:[ UseTime:0.000612s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000905s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000329s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000282s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000522s ]
  6. SELECT * FROM `set` [ RunTime:0.000303s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000512s ]
  8. SELECT * FROM `article` WHERE `id` = 513339 LIMIT 1 [ RunTime:0.000774s ]
  9. UPDATE `article` SET `lasttime` = 1780241196 WHERE `id` = 513339 [ RunTime:0.007852s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000270s ]
  11. SELECT * FROM `article` WHERE `id` < 513339 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000414s ]
  12. SELECT * FROM `article` WHERE `id` > 513339 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000392s ]
  13. SELECT * FROM `article` WHERE `id` < 513339 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000775s ]
  14. SELECT * FROM `article` WHERE `id` < 513339 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000771s ]
  15. SELECT * FROM `article` WHERE `id` < 513339 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000755s ]
0.084726s