摘要
采用电导抑制检测器– 梯度淋洗离子色谱法测定牙膏中可溶性氟含量.使用IonPac AS15（250mm×4mm） 色谱柱,IonPac AG15（250mm×4mm） 保护柱,以氢氧化钾溶液梯度淋洗,采用自循环抑制电导检测的方法对牙膏中游离氟含量进行检测.该方法能够准确地测定牙膏中游离氟含量,线性方程的相关系数在0.996 以上,样品的加标回收率为99.6%～103.0%,测定结果的相对标准偏差为0.37%～0.42%（n=6）.该法操作简单,无需使用更多化学试剂,灵敏度高,测定结果准确可靠,能满足牙膏中游离氟含量的测定要求.
The soluble fluoride in toothpaste was determined by gradient elution ion chromatography with suppressedconductivity detection. Ionpac AS15 chromatographic column and IonPac AG15 guard column were used with potassiumhydroxide gradient elution and circulation suppression conductometric. The correlation coefficients of calibration curveswere more than 0.996. The recoveries were between 99.6%–101.0% and the relative standard deviation of determationresults was 0.37%–0.42%（n=6）. The method is handy, environmental friendly and high sensitivity,it can meet therequirement of the determination of fluoride in toothpaste.
出处
《化学分析计量》
CAS
2014年第B12期60-62,共3页
Chemical Analysis And Meterage
关键词
离子色谱
牙膏
可溶性氟
电导抑制检测器
ion chromatography
toothpaste
soluble fluoride
suppressed conductivity detection
