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多效唑在茄子中的消解动态与急性膳食摄入风险评估 被引量:4

Dissipation and acute dietary intake risk assessment of paclobutrazol in Solanum melongena
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摘要 建立了茄子中多效唑残留的分析方法,开展了规范残留试验并监测了多效唑对茄子生长和品质的影响,同时对茄子中多效唑残留带来的急性膳食摄入风险进行了评估。样品经乙酸-乙腈提取,超高效液相色谱-串联质谱(UPLC-MS/MS)检测,外标法定量。结果表明:在0.02-5.0 mg/L范围内多效唑的质量浓度与对应的峰面积间线性关系良好,方法的检出限(LOD)为0.005 mg/kg,在茄子中的定量限(LOQ)为0.02 mg/kg。在0.02、0.10和0.20 mg/kg 3个添加水平下,多效唑在茄子中的回收率为88%-92%,相对标准偏差为5.1%-6.9%。其消解规律符合一级动力学方程,半衰期为1.45 d,正常收获期茄子中的最大残留量为0.02 mg/kg。多效唑可矮化茄子植株,增加产量,提高Vc、可溶性糖和黄酮含量,推荐使用剂量为有效成分12g/hm2,喷施2次。茄子中多效唑残留对中国各类人群的膳食摄入暴露量为0.70-1.9μg/(kg bw·d),仅占ARf D的0.70%-1.9%,在可接受范围内,说明茄子中多效唑残留带来的膳食摄入风险极低。 In order to study the effect of paclobutrazol on Solanum melongena,and investigate the residue behavior and the dietary intake risk of paclobutrazol in Solanum melongena,the residual trial of paclobutrazol in Solanum melongena was carried.A new method was developed to determine the residue of paclobutrazol in Solanum melongena and the influence of paclobutrazol on the yield and quality of Solanum melongena was detected.The acute risk assessment of paclobutrazol in Solanum melongena to different population was conducted.The samples were extracted with acetic acidacetonitrile and determined by UPLC-MS/MS.The calibration curve showed good linear relationship in the concentration of 0.02-5.0 mg/L.The limit of detection(LOD) and the limit of quantification(LOQ)were respectively 0.005 and 0.02 mg/kg.The recoveries ranged from 88% to 92%,and the relative standard deviation(RSD) was from 5.1% to 6.9%.The results indicated that the dissipation of paclobutrazol in Solanum melongena fitted to the first order kinetics with the half-live of 1.45 days and the highest residue of paclobutrazol in Solanum melongena was 0.02 mg/kg at the harvest period.The results also demonstrated that the application of paclobutrazol decreased the plant height,and increased the yield and content of vitamin C,soluble sugar and flavonoid.The recommended dosage of paclobutrazol applied to Solanum melongena was 12 a.i.g/hm-2 and applied twice.The national estimated short-term intake(NESTI)of paclobutrazol residue in Solanum melongena for different population was 0.70-1.9 μg/kg bw,the percentage of ARf D was 0.07%-1.9%,and both results were within an acceptable limits,which indicated the low risk of paclobutrazol in Solanum melongena.
出处 《农药学学报》 CAS CSCD 北大核心 2016年第5期612-618,共7页 Chinese Journal of Pesticide Science
基金 云南省社会发展科技计划项目(2012CA005) 国家蔬菜产品质量安全风险评估专项(GJFP201500101) 云南省科技创新人才计划(2015HC025)
关键词 多效唑 茄子 残留 消解动态 风险评估 paclobutrazol Solanum melongena residue dissipation dynamic risk assessment
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