牙膏中氟含量的测定

Determination of the content of fluoride in toothpaste

应用氟离子选择性电极法测定了市售五种牙膏中的氟含量 ,结果 :不同品牌牙膏的氟含量不同 ,最高为 0 7793mg g ,最低为 0 0 0 4 3 91mg/g ,差别很大。但所测各样品的氟含量均与产品的实际含量相吻合。

Applying the fluorine ion-selective electrode determines the content of fluoride in five kinds of toothpaste.The result is the contents of it is very different in various toothpaste,the highest value is 0 7793 mg/g,while the lowest one is 0 004391mg/g,but each determined content accords with the actual content in every product.