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Factors Affecting Transfer of Pyrethroid Residues from Herbal Teas to Infusion and Influence of Physicochemical Properties of Pesticides

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  • Jin-Jing Xiao

    (School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
    Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China)

  • Yang Li

    (Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China
    School of Resource & Environment, Anhui Agricultural University, Hefei 230036, China)

  • Qing-Kui Fang

    (School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
    Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China)

  • Yan-Hong Shi

    (Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China
    School of Resource & Environment, Anhui Agricultural University, Hefei 230036, China)

  • Min Liao

    (School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
    School of Resource & Environment, Anhui Agricultural University, Hefei 230036, China)

  • Xiang-Wei Wu

    (Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China
    School of Resource & Environment, Anhui Agricultural University, Hefei 230036, China)

  • Ri-Mao Hua

    (Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China
    School of Resource & Environment, Anhui Agricultural University, Hefei 230036, China)

  • Hai-Qun Cao

    (School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
    Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China)

Abstract

The transfer of pesticide residues from herbal teas to their infusion is a subject of particular interest. In this study, a multi-residue analytical method for the determination of pyrethroids (fenpropathrin, beta-cypermethrin, lambda-cyhalothrin, and fenvalerate) in honeysuckle, chrysanthemum, wolfberry, and licorice and their infusion samples was validated. The transfer of pyrethroid residues from tea to infusion was investigated at different water temperatures, tea/water ratios, and infusion intervals/times. The results show that low amounts (0–6.70%) of pyrethroids were transferred under the different tea brewing conditions examined, indicating that the infusion process reduced the pyrethroid content in the extracted liquid by over 90%. Similar results were obtained for the different tea varieties, and pesticides with high water solubility and low octanol–water partition coefficients (log K ow ) exhibited high transfer rates. Moreover, the estimated values of the exposure risk to the pyrethroids were in the range of 0.0022–0.33, indicating that the daily intake of the four pyrethroid residues from herbal tea can be regarded as safe. The present results can support the identification of suitable tea brewing conditions for significantly reducing the pesticide residue levels in the infusion.

Suggested Citation

  • Jin-Jing Xiao & Yang Li & Qing-Kui Fang & Yan-Hong Shi & Min Liao & Xiang-Wei Wu & Ri-Mao Hua & Hai-Qun Cao, 2017. "Factors Affecting Transfer of Pyrethroid Residues from Herbal Teas to Infusion and Influence of Physicochemical Properties of Pesticides," IJERPH, MDPI, vol. 14(10), pages 1-12, September.
    • Handle: RePEc:gam:jijerp:v:14:y:2017:i:10:p:1157-:d:113747
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    References listed on IDEAS

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    1. Zijian Li & Aaron Jennings, 2017. "Worldwide Regulations of Standard Values of Pesticides for Human Health Risk Control: A Review," IJERPH, MDPI, vol. 14(7), pages 1-41, July.
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    Cited by:

    1. Hans-Peter Hutter & Hanns Moshammer, 2018. "Pesticides Are an Occupational and Public Health Issue," IJERPH, MDPI, vol. 15(8), pages 1-3, August.

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