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HClO4浸取-离子选择电极法测定龙眼芒果中氟化物
Measuring Fluoride in Longan and Mango by HClO4 Digesting -Fluoride Ion Selective Electrode
【摘要】 采用高氯酸对南方水果龙眼、芒果中的微量氟化物进行浸取,以柠檬酸钠-氯化钠-冰醋酸组成的总离子强度作缓冲剂(TISAB),控制溶液pH=5.5,用氟离子选择电极及标准曲线法测定了龙眼、芒果中微量氟。氟离子的加标回收率为96.0%～106.1%,测定的结果表明其相对标准偏差为1.80%～3.95%,结果令人满意。
【Abstract】 Trace fluoride ions in fruits of Longan and Mango were analysed with fluoride selective electrode and standard curve of trace fluoride ion. The trace fluoride solution were prepared by taking Longan and Mango separately to solutions of perchloric acid with buffer agents of sodium citrate, sodium chloride and glacial acetic acid with pH controlling to 5.5. Results showed that the monitoring curves were deviated 1.80~3.95% from standard curve and detectable rate of the marked fluoride ions were 96.0~106.1%.
【关键词】 龙眼；
芒果；
氟离子选择电极；
氟含量；
【Key words】 Longan； Mango； fluoride ion selective electrode； fluoride content；
【Key words】 Longan； Mango； fluoride ion selective electrode； fluoride content；
【基金】 广西教育厅(2004新增33);玉林师范学院科研经费资助课题(05BS73)
- 【文献出处】 环境科学与技术 ,Environmental Science & Technology , 编辑部邮箱 ,2006年08期
- 【分类号】X835
- 【被引频次】2
- 【下载频次】74