Abstract
Two-year field trials were performed at two experimental sites to investigate dissipation and terminal residues of propamocarb in ginseng root, stem, leaf, and soil by high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). Mean recoveries ranged from 80.5 to 95.6 % with relative standard deviations (RSDs) of 5.5–9.1 % at fortified levels of 0.01, 0.02, 0.05 and 0.20 mg kg−1. The half-lives of propamocarb were 5.00–11.36 days in root, 5.07–11.46 days in stem, 6.83–11.31 days in leaf and 6.44–8.43 days in soil. The terminal residues of propamocarb were below the maximum residue limits (MRLs) of EU (0.20 mg kg−1) and South Korea (0.50 mg kg−1 in fresh ginseng and 1.0 mg kg−1 in dried ginseng) over 28 days after last spraying at recommended dosage. The results provide a quantitative basis for establishing the MRL and give a suggestion of safe and reasonable use of propamocarb in ginseng.
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This work was supported by Agricultural Product Quality and Safety of World Bank Loan Project (no. 2011-Z24) and Ginseng Industrial Development Special Funds Project of Jilin province in 2011.
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Chunwei Wang and Yan Wang contributed equally to this study.
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Wang, C., Wang, Y., Gao, J. et al. Dissipation and residues determination of propamocarb in ginseng and soil by high-performance liquid chromatography coupled with tandem mass spectrometry. Environ Monit Assess 186, 5327–5336 (2014). https://doi.org/10.1007/s10661-014-3781-y
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DOI: https://doi.org/10.1007/s10661-014-3781-y