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为了评价饮用金银花茶引起的铅暴露风险,研究模拟了日常饮用金银花的冲泡方法以及几种较为极端的冲泡方法,应用石墨炉原子吸收光谱法测定在不同的水温、不同的浸泡时间、金银花与水的比例、完整状态金银花的冲泡次数的条件下,金银花中铅的浸出率情况。结果表明:用100℃冲泡保温超声30 min,金银花与水比例1:30(w/v)时,金银花中铅浸出量在30 min时最大;完整的金银花及金银花浸泡水中的铅含量随着冲泡次数的增加而明显减少。金银花粉末中重金属铅的浸出量约占总含量的18.5%,而完整金银花铅的浸出量仅占总含量的4.9%。
In order to evaluate the risk of lead exposure caused by drinking Honeysuckle tea, this study simulated the brewing method of daily drinking honeysuckle and several more extreme brewing methods. The effects of different concentrations of water, different soaking time, The ratio of water to the total number of honeysuckle brewing conditions, the leaching rate of honeysuckle in the case. The results showed that when the ratio of honeysuckle to water was 1:30 (w / v), the leaching rate of Lonicera japonica Thunb. Was the largest at 30 min when incubated at 100 ℃ for 30 min, and the content of lead in soaked honeysuckle and honeysuckle rose The number of brewing increased significantly reduced. The leaching amount of heavy metal lead in honeysuckle powder accounts for 18.5% of the total content, while the leaching amount of intact honeysuckle lead only accounts for 4.9% of the total content.