摘要
目的制备芹菜中7种农药及其代谢物基体标准物质。方法将空白芹菜样品粉碎、冷冻干燥制成干粉后,与农药标准溶液混匀,搅拌挥发干后制得基体标准物质,经均匀性和稳定性检测,由8家实验室联合定值,并进行不确定度评估。结果基体标准物质中7种农药及其代谢物的特性值为0.497~0.502 mg/kg,扩展不确定度为0.0063~0.0110mg/kg,均匀性良好,可稳定保存至少12周。结论通过该方法制备的基体标准物质均匀性和稳定性良好,定值结果可靠,可用于检测过程的质量控制、检测方法开发、实验室能力验证等领域。
Objective To prepare 7 pesticides and their metabolites matrix reference materials in celery.Methods Blank celery samples were homogized and freeze-dried to obtain dry powder into which pesticide standard solutions were fortified and thourghly mixed.Finally,matrix reference materials were obtained after solvent evaporation.After homogeneity and stability studies,coordinated values were determined by 8 laboratories,and the uncertainty was evaluated.Results The characteristic value of the reference material were 0.497-0.502 mg/kg,the value of the expanded uncertainty were 0.0063-0.0110 mg/kg,the homogeneity was good and the stability was more than 12 weeks.Conclusion The matrix reference material prepared by this method has good homogeneity and stability,which can be used in the quality control of testing processes,the development of testing method and laboratory proficiency testing,etc.
作者
王璐
彭祎
何沛桥
史小萌
王策
刘潇威
WANG Lu;PENG Yi;HE Pei-Qiao;SHI Xiao-Meng;WANG Ce;LIU Xiao-Wei(Key Laboratory of Environmental Factor Control for Agro-product Safety,Ministry of Agriculture and Rural Affairs/Agro-Environmental Protection Institute,Ministry of Agriculture and Rural Affairs/National Reference Laboratory for Agricultural Testing P.R.China,Tianjin 300191,China)
出处
《食品安全质量检测学报》
CAS
2020年第18期6378-6385,共8页
Journal of Food Safety and Quality
基金
科技部国家科技支撑计划项目(2015BAK45B01)。
关键词
农药残留
基体标准物质
农产品
制备方法
pesticides residue
matrix reference material
farm products
preparation method