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投稿时间：2018-07-09
投稿时间：2018-07-09
中文摘要: 建立采用氧弹燃烧-离子色谱法测定茶叶中氟含量的条件及方法。以氧弹对茶叶试样进行燃烧，10 mmol/L NaOH为吸收液进行吸收，以Dionex IonPac AS 11-HC柱，KOH梯度淋洗，流速为1.0 mL/min。经离子色谱分离测定茶叶中氟的含量。氟离子的方法检出限为2.3 μg/L。利用该方法对茶叶中氟进行测定，线性相关系数为0.999 9，平均回收率为90.8%～93.7%，相对标准偏差为1.2%～3.1%。
Abstract:The determination method of fluorine in tea by oxygen bomb combustion-ion chromatography and 10 mmol/L NaOH as the absorption solution was investigated.All species were separated at a Dionex IonPac AS 11-HC column with mobile phase of KOH at a flow-rate of 1.0 mL/min.The detection limit of fluoride was 2.3 μg/L.The proposed method was used to determination the fluorine in tea samples，the correlation coefficient was 0.999 9，the recoveries of the anions were in the range of 90.8%-93.7%，the relative standard deviations of fluoride was 1.2%-3.1%.
文章编号：201903031 中图分类号： 文献标志码：
基金项目:国家质量监督检验检疫总局科技计划项目（2016IK252）
| Author Name | Affiliation |
| ZHANG Hua，CHEN Xu-yan，PENG Yang-si | Animal&Plant and Food Inspection Center of Tianjin CustomsFormer Tianjin Inspection and Quarantine Bureau，Tianjin 300461，China |
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