| 戎丽丽1,2, 吴小虎2, 董丰收2, 刘新刚2, 徐军2, 郑永权1,2*.吡嘧磺隆在水稻中的残留消解及膳食风险评估[J].植物保护,2017,43(6):127-134. |
| 吡嘧磺隆在水稻中的残留消解及膳食风险评估 |
| Dissipation, residue and dietary risk assessment of pyrazosulfuron-ethyl in rice |
| 投稿时间：2017-03-21 修订日期：2017-04-20 |
| DOI： |
| 中文关键词: 吡嘧磺隆 超高效液相色谱-串联质谱 水稻 残留 风险评估 |
| 英文关键词:pyrazosulfuron-ethyl UPLC-MS/MS rice residue risk assessment |
| 基金项目:国家公益性行业(农业)科研专项(201503017) |
| 作者 | 单位 | | 戎丽丽1,2, 吴小虎2, 董丰收2, 刘新刚2, 徐军2, 郑永权1,2* | 东北农业大学生命科学院, 哈尔滨150030
2. 中国农业科学院植物保护研究所,农业部作物有害生物综合治理重点实验室, 北京100193 |
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| 中文摘要: |
| 本文建立了超高效液相色谱-串联质谱法(UPLC-MS/MS)测定糙米、稻壳、稻田水、土壤和水稻植株中吡嘧磺隆残留的分析方法,并对我国不同人群的膳食暴露风险进行评估。样品经甲酸乙腈提取,超纯水稀释10倍,UPLC-MS/MS检测。结果表明:在添加水平为0.000 5～1 mg/kg范围内,吡嘧磺隆在稻田水、土壤、糙米、稻壳和水稻植株中平均回收率为73.7%～113.6%,相对标准偏差(RSD)为1.5%～12.5%。2014年-2015年北京、安徽和广西田间规范残留试验表明,吡嘧磺隆在水稻植株、土壤和稻田水中的消解符合一级动力学方程,半衰期分别为0.8～2.9 d,4.4~5.2 d和0.9~5.9 d。膳食摄入风险评估显示:我国各类人群的吡嘧磺隆国家估计每日摄入量(NEDI)为0.002 2~0.005 3 μg/kg,风险商值(RQ)为5.1×10-5~1.23×10-4, 表明吡嘧磺隆在糙米中的残留水平不会对人类健康造成不可接受的慢性中毒风险。 |
| 英文摘要: |
| A new method was developed to detect pyrazosulfuron-ethyl residues in rice, paddy soil, and paddy water using ultra-performance liquid chromatography with tandem mass spectrometry (UPLC-MS/MS). The dietary exposure risk assessment to different populations based on data of pyrazosulfuron-ethyl residues in rice was also investigated. The samples were extracted with acetonitrile containing formic acid. The extracts was diluted 10 times with purified water, and then detected by UPLC-MS/MS.The results showed that at spiked levels of 0.000 5 to 1 mg/kg, average recoveries of pyrazosulfuron-ethyl ranged from 73.7% to 113.6% with the relative standard deviations (RSD) of 1.5% to 12.5%. The method was used to detect the residue and dissipation of pyrazosulfuron-ethyl in rice field in Beijing, Anhui and Guangxi in 2014 and 2015. The results indicated that the dissipation of pyrazosulfuron-ethyl in rice plant, soil and paddy water fitted to the first order kinetics, with the half-life of 0.8 to 2.9 days, 4.4 to 5.2 days and 0.9 to 5.9 days, respectively. The national estimated daily intake (NEDI) was between 0.002 2 to 0.005 3 μg/kg and the risk quotients (RQ) were between 5.1×10-5 to 1.23×10-4 for different groups in China. The results revealed that the final residue levels of pyrazosulfuron-ethyl in rice will not cause unacceptable slow poisoned risk to the human health. |
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