2013~2015年广州市售普洱茶铅残留状况分析

Analysis of the lead residues of pu’er teas from 2013–2015 in Guangzhou city

中文关键词:  广州  普洱茶  铅  残留量

英文关键词:Guangzhou  pu’er tea  lead  residue

中文摘要:

      目的 掌握广州市售普洱茶铅残留状况, 为开展普洱茶铅风险评估积累基础数据, 为普洱茶监管提供参考。方法 2013~2015年, 在广州市区域范围内批发市场、零售店、餐饮单位、超市以及网店5类场所采集418份样品, 按照2013年《国家食品污染和有害因素风险工作手册》食品中铅、镉、铜测定电感耦合等离子体质谱法标准操作程序进行铅残留量测定。结果 所有样品铅残留量均未超标, 检测结果范围是0.06~4.74 mg/kg, 中位数为0.47 mg/kg, 均值为0.56 mg/kg, P95 1.26 mg/kg, 检测结果处于0~1.0 mg/kg之间样品占比91.38%, 处于1.0~2.0 mg/kg之间样品占比6.70%, 处于2.0~3.0 mg/kg之间样品占比1.20%, 处于3.0~4.0 mg/kg之间样品占比0.48%, 处于4.0~5.0 mg/kg之间样品占比0.24%; 其中, 铅残留量介于2.0~ 5.0 mg/kg的共占比1.92%。结论 广州市5类销售场所来源普洱茶铅残留量较低, 未发现铅超标样品, 居民正常饮用普洱茶铅暴露风险小。

英文摘要:

      Objective To explore the status of lead residues in pu'er tea sold in Guangzhou and accumulate basic data for the risk assessment, to provide reference for supervision of pu’er tea. Methods A total of 418 pu’er tea samples were collected from wholesale markets、retail stores、catering units、super markets and online sellers in Guangzhou from 2013-2015. The concentrations of the lead in the samples were determined by ICP-MS standard operating procedure in accordance with 2013 National Handbook on Risks of Food Pollution and Hazardous Factors. Results The lead residues in all samples were not exceeded the standard. The detection results ranged from 0.06 mg/kg to 4.74 mg/kg, with the median of 0.47 mg/kg, the mean of 0.56 mg/kg and P95 1.26 mg/kg. The percentage of samples in the range of 0.0?1.0 mg/kg was 91.38%, 1.0?2.0 mg/kg was 6.70%, 2.0?3.0 mg/kg was 1.20%, 3.0?4.0 mg/kg was 0.48%, 4.0?5.0 mg/kg was 0.24%. Among them, 1.92% of the lead residues ranged from 2.0 mg/kg to 5.0 mg/kg. Conclusion The lead residues in pu’er tea from five types of sales places in Guangzhou are relatively low.There is no samples exceeding the lead standard, and the risk of lead exposure of residentsto normal drinking pu’er tea is small.