白蚁防治后香榧中氟虫腈残留量的检测

目的使用白蚁诱杀盒(含氟虫腈)防治香榧树白蚁后,检测氟虫腈在香榧中的残留量。方法利用气相色谱法对香榧样品中的氟虫腈残留量进行检测。结果氟虫腈及其3种代谢物在香榧中的平均添加回收率在66.5%～115.8%之间,相对标准差介于2.2%～15.6%之间,符合农药残留分析要求。而香榧样品中氟虫腈残留量检出浓度低于0.001 mg/kg。结论使用诱杀盒防治白蚁后,香榧果实无毒、无氟虫腈残留,符合环保要求。

Determination residue of fipronil after termite control in Torreya grandis

Objective To determine residue of fipronil in T.grandis after termite control by booby-traps box,which contains fipronil.Methods Gas chromatography to determine residue of fipronil in T.grandis samples.Results The average recoveries and relative standard deviation of fipronil and 3 kinds of metabolites were in the range 66.5%-115.8% and 2.2%-15.6%,according to requirements of pesticide residue analysis.The detection concentrations was less than 0.001 mg/kg for residues of fipronil in T.grandis.Conclusion After useing the booby-traps box to control termites,the fruits of T.grandis were non-toxic,non-fipronil residues,complying with the environmental requirements.