茶叶中联苯菊酯残留自然基体标准样品的研制  

Development of Natural Matrix Standard Tea for Quality Control of Bifenthrin Residues

作　　者：余孔捷[1] 杨方[1] 黄杰[1] 李耀平[1] 江锦彬[1] 李捷[1] 蓝锦昌[1] 王彦[1] 

机构地区：[1]福建出入境检验检疫局,福建省检验检疫技术研究重点实验室,福建福州350001

出　　处：《食品科学》2013年第8期317-320,共4页Food Science

基　　金：福建省重点科技项目(2007Y0001);福建出入境检验检疫局科技项目(FK2010-23)

摘　　要：为获得与真实检测样品完全一致的茶叶中联苯菊酯残留分析质量控制用标准样品,建立制备茶叶中联苯菊酯自然基体标准样品的方法。以每亩茶园约3.0g联苯菊酯的用量对茶树喷洒0.017g/L联苯菊酯药液,每日监控检测施药后茶叶中联苯菊酯含量,适时采茶,正常制茶,磨粉并通过120目网筛获得联苯菊酯残留不同含量的2批各320个独立包装的茶粉样本。经均匀性检验、稳定性检验、协同定值和不确定度评估,制得检测质控用茶叶中联苯菊酯残留自然基体标准样品。该标准样品应用于全国98家实验室参加的能力验证计划。In order to obtain quality control standard for the analysis of bifenthrin residues in tea, a methodology was explored for establishing tea natural matrix reference material containing bifenthrin. Tea plants were due to the spraying of 0.17 g/L bifenthrin solution at a dosage of 3.0 g/mu （1 mu = 666.67 m^2）. Daily monitoring detection was conducted after the application of bifenthrin in tea plants. After tea picking at appropriate moment, normal tea making, and milling and screening through 120 mesh, the content of bifenthrin residues in 320 tea samples with independent bags from 2 batches were determined. The homogeneity and stability of the samples were examined. The chemical constituents of the samples were certified through collaborative analysis program and uncertainty assessment. The developed standard was applied to CNAS national proficiency testing program participated by 98 laboratories.

关 键 词：茶叶 联苯菊酯残留 自然基体 标准样品 

分 类 号：O652[理学—分析化学]