摘要
对HClO4作为新介质在氟离子选择性电极法中测定食品中的微量氟做了探索和研究。在0．35mol/L HClO4介质中，氟离子浓度在1．0×10^-2～1．0×10^-6mol/L范围内呈良好的线性关系，线性相关系数r=0．9997。利用本法测定了牛奶、卷心菜中氟离子的含量，其结果与现有其他文献方法相当，但本法试验操作大为简化。测定的相对标准偏差在1．54％～2．30％之间。在该介质中测定微量氟操作简便、快速，具有较高的精密度和准确度。所以，HClO4溶液可作为氟离子选择性电极的测定介质。
A novel medium for the determination of fluoride in some food samples by ion- selective electrode method has been explored. In the medium of 0.35 mol/L HClO4, the linear response for fluoride was in the range of 1.0 × 10^-2 ～1.0 × 10^-6 mol/L with regression coefficient of 0.9997 and RSDs between 1.52 % -2.30 %, depending on samples. The method has been used to the determination of fluoride in milk and cabbage samples. The results obtained are as good as those obtained by some other existing literature methods, but with much simpler experimental procedures and shorter analysis time, proving HClO4 can be used as an alternative medium to TISAB for the determination of fluoride in ion selective electrode method.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2006年第1期107-110,共4页
Journal of Hebei Agricultural University
基金
教育部留学回国人员科研启动基金
人事部留学人员科技择优资助项目
河北农业大学博士启动基金
