摘要
建立甲醇中氯苯溶液标准物质的研制及不确定度评定方法。使用气相色谱(GC)和液相色谱(HPLC)两种不同方法精确测定氯苯主成分含量,电感耦合等离子体质谱仪(ICP-MS)和卡尔·费休水分仪(KF)测定无机杂质和水分含量,并最终通过质量平衡法对氯苯纯度进行准确定值。采用重量-容量法制备特性量值为10.0μg/m L的甲醇中氯苯溶液标准物质,其主要用于污染物中氯苯的成分分析、环境评价以及相应分析方法的确认等,制备的标准物质均匀性和稳定性良好,定值结果的相对扩展不确定度为U=3%(k=2),有效期限24个月,通过与同类国家标准样品甲醇中氯苯GSB 07-1220——2000量值比对,验证制备方法定值结果的准确性。
The preparation and evaluation for uncertainty methods of chlorobenzene certified reference material （CRM） in methanol were established. The main component content of chlorobenzene was determined by gas chromatography （GC） and high performance liquid chromatography （HPLC）, and the contents of inorganic impurities and water were also analyzed by inductively coupled plasma mass spectrometry （ICP-MS） and coulometric Karl Fischer titrator, respectively. Finally, the purity of chlorobenzene was accurately determined by Mass-Balance method. This CRM solution with characteristic value of 10.0μg/mL that primarily used for the content analysis of chlorobenzene in pollutants, evaluation of environment and validation of analytical methods was prepared by Weighting-Volumetric method. The developed CRM has good homogeneity and stability with the uncertainty of 3%（k=2） and the validity period of 24 months. Compared with the national reference material of chlorobenzene in methanol （GSB 07-1220---2000）, the accuracy of preparing method was confirmed.
出处
《中国测试》
CAS
北大核心
2016年第8期48-52,共5页
China Measurement & Test
关键词
氯苯
标准物质
特性量值
不确定度
chlorobenzene
reference material
characteristic value
uncertainty
