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Dissipation and residue of triforine in strawberry and soil

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Abstract

Two independent field trials were performed in Guangdong and Hubei, China in 2011 to investigate the dissipation and residue levels of triforine in strawberry and soil. A fast and simple method using gas chromatography with electron capture detector was developed and validated to determine triforine levels in strawberry and soil. The average recovery of triforine in strawberry ranged from 87.46 to 104.32 % with a relative standard deviation (RSD) of 0.72 to 4.54 %; that in soil ranged from 83.82 to 103.01 % with an RSD of 3.89 to 4.36 %. The limit of quantification of the proposed method was 0.01 mg/kg for both strawberry and soil. The results suggest that the triforine dissipation curves followed the first-order kinetic. The half-lives of triforine in strawberry from Guangdong and Hubei were 3.58 and 4.42 days, respectively; those in soil were 3.53 and 4.10 days, respectively. The terminal residues of triforine in strawberry ranged from 0.032 to 0.264 mg/kg at preharvest intervals of 0.5, 1, and 3 days. These values are lower than the maximum residue limit of 1 mg/kg in strawberry set by the Codex Alimentarius Commission.

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Acknowledgments

This work was supported by the Institute for the Control of Agrochemicals, Ministry of Agriculture of the People’s Republic of China and Sumitomo Corporation, Japan.

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Authors and Affiliations

  1. Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, 510642, Guangzhou, China

    Ning Zhang, Hong Li, You Zhou, Wei Hu & Zhixiang Zhang

  2. State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, 510642, Guangzhou, China

    Zhixiang Zhang

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  1. Ning Zhang
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  2. Hong Li
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  4. Wei Hu
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Correspondence to Zhixiang Zhang.

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Zhang, N., Li, H., Zhou, Y. et al. Dissipation and residue of triforine in strawberry and soil. Environ Monit Assess 186, 1377–1384 (2014). https://doi.org/10.1007/s10661-013-3460-4

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  • DOI: https://doi.org/10.1007/s10661-013-3460-4

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