摘要
建立硫酸盐氧化-薄膜电导率法测定自来水中总有机碳的分析方法。样品经孔径为0.45μm的滤膜过滤器过滤,选择进样瓶直接进样,在自适应模式下进行测定。总有机碳的质量浓度在0〜10 mg/L范围内与响应值具有良好的线性关系,线性相关系数为0.999,方法检出限为0.02μg/L。测定结果的相对标准偏差不大于1.3%(n=6),样品加标回收率为91.0%〜102.8%。该方法操作简便,准确度高,适用于自来水中总有机碳含量的测定。
A method of the determination of total organic carbon in tap water by persulphate oxidation-membrane conductivity was established.The sample was filtered by a membrane filter with a membrane pore size of 0.45μm,and the injection bottle was selected for direct injection.The measurement was carried out in adaptive mode.The mass concentration of the total organic carbon had a good linear relationship with the response value in the range of 0-10 mg/L,the linear correlation coefficient was 0.999,and the detection limit of the method was 0.02μg/L.The relative standard deviation of the determination results was less than 1.3%(n=6),and the recoveries were 91.0%-102.8%.The method is simple to operate and highly accurate,which is suitable for the determination of the total organic carbon in tap water.
作者
任昀
张遥奇
李娅
朱翔
Ren Yun;Zhang Yaoqi;Li Ya;Zhu Xiang(Hunan Institute of Metrology and Test,Changsha 410014)
出处
《化学分析计量》
CAS
2021年第4期7-10,共4页
Chemical Analysis And Meterage
基金
国家科技部质量基础专项(2019YFF0216804)
湖南省科技创新计划项目(2018XK2008)。
关键词
总有机碳
膜电导率
自来水
total organic carbon
membrane conductivity
tap water
