摘要
建立了离子色谱测定食品添加剂磷酸二氢铵中的氟离子含量的方法.结果表明,在最佳实验条件下,食品添加剂磷酸二氢铵中的NH4＋,PO43-及SO42-等杂质均不干扰F-的测定.采用标准曲线法定量,F-浓度在4～50 μg/mL的范围内,线性方程为y=0.099 48x-0.108 0,线性相关系数为0.999 9,方法的检出限为0.15 μg/mL,加标回收率为96.9％～101.6％,该方法具有简单、快速、重现性好等优点.
A method for the determination of fluoride in food additive-ammonium dihydrogen phosphate by Ion Chromatography was studied in this paper. The results show that the impurities such as NH＋ , PO34- and SO24- do not interfere with the determination of F- under the optimal experimental conditions. When F- concentration is in the range of 4-50 μg/mL, the linear equation is y=0. 099 48x-0. 107 9 with the linear correlation coefficient of 0. 999 9. The detection limit of the method is 0. 015 μg/mL and the recoveries are between 96.9% to 101.6%. This method has the advantages of simplicity, fast speed and good reproducibility.
出处
《中国无机分析化学》
CAS
2014年第1期25-27,共3页
Chinese Journal of Inorganic Analytical Chemistry
关键词
离子色谱法
食品添加剂磷酸二氢铵
氟离子含量
ion chromatography
food additive-ammonium dihydrogen phosphate
content of the fluoride
