粮油食品科技

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浓度直读法快速测定花生中氟含量及其分布
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Rapid determination of fluoride distribution in peanut by direct reading concentration method
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    摘要:

    为了建立一种快速、简便测定花生中氟含量及其分布的新方法,以花生为样品,利用超声波辅助浸提技术,用氟离子选择性电极浓度直读法测定。结果表明:氟电极的转化系数为90.53%,5次平行测定的相对标准偏差RSD<4.1%,加标回收率为91.6%~101.0%。氟在花生中分布由外到内依次减少。信阳市花生仁氟含量最低,为0.52 μg/g。该方法2 h之内即可完成,具有快速,方便,实用性强,对环境污染较小等优点,适合现场批量快速测定。

    Abstract:

    In order to establish a rapid,simple and new analysis method for determination of fluorine content and its distribution in peanut.With peanut as the samples from Xinyang and dengzhou city respectively,The Determination of fluoride ion by selective electrode with direct reading concentration method,after samples were extracted with ultrasonic.The results show that Conversion factor of fluorine electrode was 90.53%,relative standard deviation RSD<4.1% based on the Samples parallel determination(n=5),and Standard addition recovery was 91.6%~101.0% between.The fluorine distribution is reduced from outside to inside in peanut.Xinyang dry base peanut fluorine content lowest is 0.52 μg/g.This method can complete within 2 h,At the same time with fast,convenient and practical,less environmental pollution,suitable for mass rapid determination.

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高向阳,高遒竹,张小燕,王风云.浓度直读法快速测定花生中氟含量及其分布[J].粮油食品科技,2016,24(1):64-67.

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  • 在线发布日期: 2016-02-05
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