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含氟牙膏中的氟含量测定方法准确度探究

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更新日期:2020-12-05 16:55

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2020年12月5日发(作者:褚启元)
龙源期刊网 http:
含氟牙膏中的氟含量测定方法准确度探究

作者:宋崇富 王中跃 田志美 李若 蒋雪月 张坤 盛良全

来源:《安徽农业科学》2015年第01期

摘要
[目的]研究含氟牙膏中的氟含量测定方法的准确度。[方法]采用氟离子选择电极法和离子
色谱法测定 黑人、中华和佳洁士3种牙膏中氟离子的含量。[结果]氟离子选择电极法测得的3
种牙膏氟含量分别为 0.071 4%、0.103 0%和0.076 8%,而离子色谱法测得的3种牙膏氟含量分
别为0.109 5%、0.197 2%和0.137 0%。3种牙膏所标氟含量分别为0.10%、0.14%和0.11%。
[结论]氟离子选择电极法测 定值比样品的实际标注值低,而离子色谱法测得结果比样品的实际
标注值略高。比较两种方法与标注值的 差,发现离子色谱法比氟离子选择电极法测定结果更准
确。对氟离子选择电极法和离子色谱法的样品进行 了加标回收试验,回收率分别在93.45%~
97.70%和107.28%~108.80%。
关键词氟离子选择电极法;离子色谱法;氟含量;准确度;含氟牙膏
中图分类号S181.3文献标识码A文章编号0517-6611(2015)01-214-03
Study on the Accuracy of Determination Methods of Fluoride Content in Fluoride Toothpaste
SONG Chongfu, WANG Zhongyue, TIAN Zhimei et al
(School of Chemical and Material Engineering, Fuyang Teachers College, Fuyang, Anhui
236037)
Abstract[Objective] The research aimed to study the accuracy of determination methods of
fluoride content in fluoride toothpaste. [Method] We used fluorine ion selective electrode method and
ion chromatography to determine the fluoride contents in three kinds of fluoride toothpastes:
Darlie, Zhonghua and Crest. [Result] The fluoride contents measured by fluorine ion selective
electrode method are 0.071 4%, 0.103 0% and 0.076 8% for the three toothpastes, while the
fluoride contents measured by ion chromatography are 0.109 5%, 0.197 2% and 0.137 0%. The
fluoride contents on the labels of the three toothpastes are 0.10%, 0.14% and 0.11% respectively.
[Conclusion] The measured values by the fluorine ion selective electrode method are lower than those
on the labels, but the estimated values by ion chromatography are slightly higher. Compared the two
measured values and the values on the labels, it was found that ion chromatography is more accurate
than fluorine ion selective electrode method. Recovery experiments were carried out about fluorine
ion selective electrode method and ion chromatography, and their recovery percents are 93.45%-
97.70% and 107.28%-108.80% respectively.

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