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0.52μg/g.该方法2h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.
In order to establish a rapid,simple and new analysis method for determination of fluorine con-tent and its distribution in peanut.With peanut as the samples from Xinyang and dengzhou city respective-ly,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 pollu-tion,suitable for mass rapid determination.
出处
《粮油食品科技》
2016年第1期64-67,共4页
Science and Technology of Cereals,Oils and Foods
基金
郑州市科技局新兴产业研究与开发基金项目(153PXXCY186)
关键词
超声波浸提
浓度直读法
快速测定
氟分布
花生
ultrasonic extraction
concentration direct reading
rapid determination
fluorine distribution
peanut
