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目的了解袋泡茶型保健食品铅的浸出率和人群摄入量,为进一步评估其安全性提供基础数据。方法从北京市商场、超市、药店购买18种袋泡茶型保健食品,按照GB5009.12-2010检测样品和浸提液中铅含量。用产品中铅含量与产品标识的食用量和铅的浸出率相乘计算铅的摄入量。采用联合国粮农组织和世界卫生组织食品添加剂联合专家委员会推荐的暂定每周耐受摄入量(PTWI)值评价铅摄入的安全性。结果袋泡茶型保健食品浸泡后铅的浸出量为0.0036～0.5400mg/kg,平均浸出率为5.49%。人群铅的摄入量为0.018～4.324μg,占暂定每周耐受摄入量(PTWI)的最高比例为2.0%,平均仅为0.8%。结论 18种袋泡茶型保健食品铅的摄入量是安全的,但个别产品较高的铅含量应引起监管部门关注。
Objective To understand the lead leaching rate and population intake of teabag-type health food and provide the basic data for further assessment of its safety. Methods 18 kinds of teabag-type health foods were purchased from Beijing shopping malls, supermarkets and pharmacies. The contents of lead in the samples and extracts were determined according to GB5009.12-2010. Lead intake was calculated by multiplying the lead content in the product by the product-labeled edible amount and lead leaching rate. The safety of lead intake was evaluated using the provisional weekly tolerable intake (PTWI) values recommended by the Joint FAO / WHO Expert Committee on Food Additives. Results The leaching amount of lead in teabag-type health food was 0.0036 ~ 0.5400mg / kg and the average leaching rate was 5.49%. Lead intake in the population ranged from 0.018 to 4.324 μg, accounting for a maximum of 2.0% of the provisional PTWI and an average of only 0.8%. Conclusion The intake of lead in 18 kinds of teabag-type health food products is safe, but the high lead content of individual products should cause regulatory authorities’ attention.