SPE-HPLC-MS/MS 法测定人参及土壤中氟硅唑的残留及风险评估
Residue determination by SPE-HPLC-MS/MS and risk assessment of flusilazole in the ginseng and soil
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摘要: 【目的】明确人参和土壤中氟硅唑的残留量，并对可能产生的膳食风险进行评估，以确保人参产品的质量安全.【方法】 在集安市和抚松县进行2年试验，采用固相萃取-高效液相色谱-串联质谱法测定了400 g·L-1 氟硅唑乳油在人参根及土壤中的残留消解及最终残留量，并采用风险商值法对人参中氟硅唑可能产生的膳食风险进行了评估.【结果和结论】施药剂量为90 g·hm-2 (以有效成分计)时，氟硅唑在人参根和土壤中的降解半衰期分别为7.85~9.94和5.59~7.13 d.施药剂量为60~90 g·hm-2 时，施药后35 d氟硅唑在人参根和土壤中的残留量分别小于0.043 3和0.037 5 mg·kg-1.风险商值为4.59×10-5，风险较低，处于安全水平.建议我国在人参中氟硅唑的最大残留限量值可暂定为0.05 mg·kg-1，安全间隔期为35 d.
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关键词:
- 人参 /
- 氟硅唑 /
- 残留 /
- 风险评估 /
- 固相萃取-高效液相色谱-串联质谱法
Abstract: 【Objective】 To investigate flusilazole residues in ginseng and to conduct risk assessment. 【Method】 A solid phase extraction (SPE) and high performance liquid chromatography coupled with mass spectrometry (SPE-HPLC-MS/MS) method was developed to determine the residual dissipation and final residues of flusilazole 400 g·L-1 EC in ginseng root and soil at Fusong County and Ji’an City in 2011 and 2012. The dietary risk assessment was also conducted using the calculation of risk quotient (RQ).【Result and conclusion】 The half-lives of flusilazole were 7.85-9.94 d in root and 5.59-7.13 d in soil at spraying dosage of 90 g·hm-2. Final residues of flusilazole were below 0.043 3 mg·kg-1 in root and below 0.037 5 mg·kg-1 in soil, and the risk was very low with 4.59×10-5 (much less than 1) of a risk quotient, and the residues could be declined to the safe level over 35 days after spraying once or twice at a dosage ranging from 60 to 90 g·hm-2. It is recommended that the MRL of flusilazole in ginseng should be 0.05 mg·kg-1 temporarily, and its preharvest interval should be set at 35 days.-
Keywords:
- ginseng /
- flusilazole /
- residue /
- risk assessment /
- SPE-HPLC-MS/MS
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