摘要
研制水中亚硝酸根离子标准物质。采用杂质扣除法和差式扫描量热法确定原材料亚硝酸钠的纯度为99.86%,相对扩展不确定度为0.20%(k=2);采用重量–容量法配制水中亚硝酸根离子标准物质,并对研制的标准物质进行F检验和趋势线检验。结果表明,研制的水中亚硝酸根离子标准物质的标准值为1 000 mg/L,相对扩展不确定度为1%(k=2)。该标准物质具备良好的均匀性和稳定性,可用于亚硝酸根离子分析检测方法评价和仪器校准,符合国家二级标准物质的要求。
The reference material of nitrate ion in water was prepared.The purity of sodium nitrite was 99.86%and the relative expanded uncertainty was 0.20%(k=2),which were determined by impurity deduction and differential scanning calorimetry(DSC).The reference material of nitrate ion in water was prepared by weight–volumetric method,and F test and trend line test were carried out for the reference material.The results showed that the standard value of the reference material of nitrate ion in water was 1 000 mg/L,the relative expanded uncertainty was 1%(k=2).The reference material has good uniformity and stability,it can be used for the evaluation of nitrite ion analysis and the calibration of the instrument,which meets the requirements of the national reference material of the two level.
作者
刘新
刘霞
王爱萍
龚维
姚旭霞
吕辉
LIU Xin;LIU Xia;WANG Aiping;GONG Wei;YAO Xuxia;LYU Hui(Institute 53 of China Ordnance Industry Group,Jinan 250031,China)
出处
《化学分析计量》
CAS
2018年第5期6-10,共5页
Chemical Analysis And Meterage
