摘要
目的对国标方法测定特殊医学用途配方食品和婴幼儿配方乳粉类产品中氟含量测定进行改进。方法样品经Taka淀粉酶酶解,高氯酸溶液沉淀蛋白质,加入总离子强度缓冲剂消除金属干扰离子,过滤后,使用氟离子选择电极测定样品中氟含量。结果与国标法相比,改进方法使测试溶液澄清,电极响应更快,回收率范围为92.8%~107.5%,相对标准偏差为3.36%~4.38%,能满足方法准确度和精密度要求。结论改进后的方法能够满足方法学要求,能够准确地检测特殊医学用途配方食品和婴幼儿配方乳粉类产品中的氟含量。
Objective To improve the national standard method for the determination of fluorine in formula food for special medical use and infant formula milk powder products.Methods The samples were enzymolysised by Taka amylase,the proteins were precipitated by perchloric acidsolution,the metal ion interference was masked by total ion strength buffer,and the fluorine in samples which were filtrated was detected by fluoride ion selective electrode.Results A clear solution was obtained by using the improved method,whose electrode response was more faster than the national standard method.The recovery was 92.8%-107.5%,and the relative standard deviation was 3.36%-4.38%,which could meet the accuracy and precision requirements of the method.Conclusion It is verified that the improved method could meet the requirements of methodology,and it can accurately detect the fluorine content in formula food for special medical purpose and infant formula milk powder products.
作者
王文特
田洪芸
张海红
傅骏青
吴鸿敏
任雪梅
WANG Wen-Te;TIAN Hong-Yun;ZHANG Hai-Hong;FU Jun-Qing;WU Hong-Min;REN Xue-Mei(Shandong Institute of Food and Drug Control,Ji'nan 250101,China;Shandong Quality Control Engineering Technology,Research Center of Foods for Special Medical Purpose,Ji'nan 250101,China)
出处
《食品安全质量检测学报》
CAS
2020年第10期3266-3272,共7页
Journal of Food Safety and Quality
关键词
氟含量
氟离子选择电极法
特殊医学用途配方食品
婴幼儿配方乳粉
fluorine content
fluoride ion selective electrode method
formula food for special medical purpose
infant formula milk powder
