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用氟离子选择电极测定牙膏中的氟含量,本法测定回收率为98.63%~104.00%,变异系数为3.83%。
Fluoride ion-selective electrode was used to determine the content of fluoride in toothpaste. The recovery of this method was 98.63% ~ 104.00% with the coefficient of variation of 3.83%.