福建省乌龙茶、红茶中部分农药残留及日摄入量评估

Pesticide Residue and Safety of Teas from Fujian

随机采集福建省茶叶55份(乌龙茶43份,红茶12份),利用GC-MS/MS、LC-MS/MS对其18项农药残留进行检测,根据国标规定农药最大残留限量(MRL)或再残留限量(EMRL)对其进行评估,无残留限量的农药种类采用每日允许摄入量(ADI)进行评估。结果表明,11份样本检测出禁用农药残留,乌龙茶和红茶中均有检出,检出率为20%。26个样本检出未登记农药残留,乌龙茶和红茶均有检出,检出率为47.3%。茶叶农药残留检出率最高的项目是联苯菊酯。风险评估的结果表明,55个茶叶样品18项农残,除吡虫啉外有MRL国标的全部达标;无MRL的农药品种及吡虫啉通过ADI值比较,经饮茶进入人体的农药量远低于允许安全量,符合日允许摄入量要求。

Residue of 18 pesticides in 55 teas from Fujian were determined using GC-MS/MS and LC MS/MS. Quantities of the residual pesticides were compared to the recommended limits, such as MRL, EMRL and/or ADI, to assess the product safety. Eleven samples, including black and oolong tea, had detectable amounts of prohibited pesticides. Some unregistered pesticides were also present in 26 samples. Bifenthrin was the most frequently detected pesticides among all. The safety assessment indicated that only the level of imidacloprid residue in a certain tea samples was lower than MRL. And, in general, the daily pesticide ingestion from average tea drinking was within the safety limits set forth by ADI.