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《化学分析计量》 2018年第05期
DOI:10.3969/j.issn.1008-6145.2018.05.002
水中亚硝酸根离子标准物质的研制
刘新,刘霞,王爱萍,龚维,姚旭霞,吕辉
中国兵器工业集团第五三研究所,济南 250031 
Preparation of reference material of nitrate ion in water
LIU Xin, LIU Xia, WANG Aiping, GONG Wei, YAO Xuxia, LYU Hui
Institute 53 of China Ordnance Industry Group, Jinan 250031, China 
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。 
Abstract: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.  
关键词:亚硝酸根离子;杂质扣除法;差式扫描量热法;纯度;重量-容量法;标准物质 
Keywords:nitrate ion; impurity deduction; DSC; purity; weight-volumetric method; reference material 
本文引用格式:
刘新,刘霞,王爱萍,等.水中亚硝酸根离子标准物质的研制[J].化学分析计量,2018,27(5):6-10. LIU X,LIU X,WANG A P,et al. Preparation of reference material of nitrate ion in water[J]. Chemical analysis and meterage,2018,27(5):6-10. 

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